Using Freezing-Point Depression to Find Molecular Weight. Evaluation copy
|
|
|
- Ashlynn Amanda Dickerson
- 6 years ago
- Views:
Transcription
1 Using Freezing-Point Depression to Find Molecular Weight Computer 4 When a solute is dissolved in a solvent, the freezing temperature is lowered in proportion to the number of moles of solute added. This property, known as freezing-point depression, is a colligative property; that is, it depends on the ratio of solute and solvent particles, not on the nature of the substance itself. The equation that shows this relationship is t = K f m where t is the freezing point depression, K f is the freezing point depression constant for a particular solvent (3.9 C kg/mol for lauric acid in this experiment 1 ), and m is the molality of the solution (in mol solute/kg solvent). OBJECTIVES In this experiment, you will Determine the freezing temperature of the pure solvent, lauric acid. Determine the freezing temperature of a mixture of lauric acid and benzoic acid. Calculate the freezing point depression of the mixture. Calculate the molecular weight of benzoic acid. MATERIALS Figure 1 Evaluation copy Vernier computer interface lauric acid-benzoic acid mixture computer hot water bath Temperature Probe two mm test tubes ring stand utility clamp 400 ml beaker paper towel or tissue lauric acid, CH 3 (CH 2 ) 10 COOH 1 The Computer-Based Laboratory, Journal of Chemical Education: Software, 1988, Vol.1A, No. 2, p. 73. Advanced Chemistry with Vernier 4-1
2 Computer 4 PROCEDURE 1. Obtain and wear goggles. 2. Connect a Temperature Probe to Channel 1 of the Vernier computer interface. Connect the interface to the computer with the proper cable. 3. Start the Logger Pro program on your computer. Open the file 04 Freezing Point from the Advanced Chemistry with Vernier folder. Part I Determine the Freezing Temperature of Pure Lauric Acid 4. Add about 300 ml of tap water with a temperature of C to a 400 ml beaker. Place the beaker on the base of the ring stand. 5. Use a utility clamp to obtain a test tube containing hot, melted lauric acid from your instructor. Fasten the utility clamp at the top of the test tube. CAUTION: Be careful not to spill the hot lauric acid on yourself and do not touch the bottom of the test tube. 6. Insert the Temperature Probe into the hot lauric acid. Fasten the utility clamp to the ring stand so the test tube is above the water bath. Click to begin the data collection. 7. Lower the test tube into the water bath. Make sure the water level outside the test tube is higher than the lauric acid level inside the test tube, as shown in Figure With a very slight up-and-down motion of the Temperature Probe, continuously stir the lauric acid for the ten-minute duration of the experiment. 9. When the data collection is complete, use a hot water bath to melt the lauric acid enough to safely remove the Temperature Probe. Carefully wipe any excess lauric acid liquid from the probe with a paper towel or tissue. 10. The freezing temperature can be determined by finding the mean temperature in the portion of the graph with nearly constant temperature. a. Move the mouse pointer to the beginning of the graph s flat part. Press the mouse button and hold it down as you drag across the flat part of the curve, selecting only the points in the plateau. b. Click the Statistics button,. c. The mean temperature value for the selected data is listed in the statistics box on the graph. Record this value as the freezing temperature of pure lauric acid. d. Click on the upper-left corner of the statistics box to remove it from the graph. Part II Determine the Freezing Temperature of a Solution of Benzoic Acid and Lauric Acid 11. Prepare the computer for data collection. a. From the Experiment menu, choose Store Latest Run. This stores the data so it can be used later. b. To hide the curve of your first data trial, click the Temperature y-axis label of the graph and choose More. from the dropdown list. Uncheck the Run 1 Temperature box and click. 4-2 Advanced Chemistry with Vernier
3 Using Freezing Point Depression to Find Molecular Weight 12. Obtain a test tube containing a melted solution with ~1 g of benzoic acid dissolved in ~ 8 g of lauric acid. Record the precise masses of benzoic acid and lauric acid as indicated on the label of the test tube. Repeat Steps 4 9. Freezing Point Time 13. The freezing temperature of the benzoic acid-lauric acid solution can be determined by finding the temperature at which the mixture initially started to freeze. Unlike pure lauric acid, the mixture results in a gradual linear decrease in temperature during freezing. Follow the steps below to analyze the graph. a. Click and drag the mouse to highlight the initial part of the cooling curve where the temperature decreases rapidly (before freezing occurred). b. Click on the Linear Regression button,. c. Now click and drag the mouse over the next linear region of the curve (the gently sloping section of the curve where freezing took place). d. Click again. The graph should now have two regression lines displayed. e. Choose Interpolate from the Analyze menu. Move the cursor to the point of intersection of the two lines; you will know if the cursor is over the intersection when the temperature readings displayed in the interpolate box are the same. This is the freezing point of the benzoic acid-lauric acid mixture. f. Record the freezing point in your data table. 14. Print a graph showing both trials. DATA TABLE Mass of lauric acid (g) Mass of benzoic acid (g) Freezing temperature of pure lauric acid ( C) Freezing point of the benzoic acid-lauric acid mixture ( C) Advanced Chemistry with Vernier 4-3
4 Computer 4 DATA ANALYSIS 1. Calculate molality (m), in mol/kg, using the formula t = K f m. The K f value for lauric acid is 3.9 C kg/mol. 2. Calculate moles of benzoic acid solute, using the molality and the mass (in kg) of lauric acid solvent. 3. Calculate the experimental molecular weight of benzoic acid, in g/mol. 4. Determine the accepted molecular weight of benzoic acid from its formula, C 6 H 5 COOH. 5. Calculate the percent discrepancy between the experimental and accepted values. 4-4 Advanced Chemistry with Vernier
5 Vernier Lab Safety Instructions Disclaimer THIS IS AN EVALUATION COPY OF THE VERNIER STUDENT LAB. This copy does not include: Safety information Essential instructor background information Directions for preparing solutions Important tips for successfully doing these labs The complete Advanced Chemistry with Vernier lab manual includes 35 labs and essential teacher information. The full lab book is available for purchase at: Vernier Software & Technology S.W. Millikan Way Beaverton, OR Toll Free (888) (503) FAX (503)
Evaluation copy. Enzyme Action: Testing Catalase Activity. Computer
Enzyme Action: Testing Catalase Activity Computer 6A Many organisms can decompose hydrogen peroxide (H 2 O 2 ) enzymatically. Enzymes are globular proteins, responsible for most of the chemical activities
Evaluation copy 17B. Enzyme Action: Testing Catalase Activity. Computer
Enzyme Action: Testing Catalase Activity Computer 17B Many organisms can decompose hydrogen peroxide (H 2 O 2 ) enzymatically. Enzymes are globular proteins, responsible for most of the chemical activities
Osmosis. Evaluation copy
Osmosis Computer 1B In order to survive, all organisms need to move molecules in and out of their cells. Molecules such as gases (e.g., O 2, CO 2 ), water, food, and wastes pass across the cell membrane.
Lactase Action. Evaluation copy
Lactase Action Computer 24A Lactose, a disaccharide sugar found naturally in mammalian milk, is utilized by infants as one of their initial sources of energy. During infancy, mother s milk is often the
Using Freezing-Point Depression to Find Molecular Weight
Usin Freezin-Point Depression to Find Molecular Weiht Experiment 15 When a solute is dissolved in a solvent, the freezin temperature is lowered in proportion to the number of moles of solute added. This
Enzyme Analysis using Tyrosinase. Evaluation copy
Enzyme Analysis using Tyrosinase Computer 15 Enzymes are molecules that regulate the chemical reactions that occur in all living organisms. Almost all enzymes are globular proteins that act as catalysts,
Evaluation copy. Grip Strength and Muscle Fatigue. Computer
Grip Strength and Muscle Fatigue Computer 17 Skeletal muscle is composed of bundles of individual muscle fibers (see Figure 1) and has unique properties which allow it to respond to stimuli by contracting.
Heart Rate and Body Position
Name Date Heart Rate and Body Position Computer 25 Does the position of your body affect your heart rate? In this experiment, you will use a Heart Rate Monitor to measure your heart rate while sitting,
ENZYME ACTION: TESTING CATALASE ACTIVITY
Name Date Period ENZYME ACTION: TESTING CATALASE ACTIVITY Many organisms can decompose hydrogen peroxide (H 2 O 2 ) enzymatically. Enzymes are globular proteins, responsible for most of the chemical activities
Evaluation copy. EMG and Muscle Fatigue. Computer
EMG and Muscle Fatigue Computer 18 Voluntary muscle contraction is the result of communication between the brain and individual muscle fibers of the musculoskeletal system. A thought is transformed into
Heart Rate and Exercise. Evaluation copy. Figure 1
Heart Rate and Exercise Computer 4 The adaptability of the heart can be observed during exercise, when the metabolic activity of muscle tissue increases. The cardiovascular system, consisting of the heart
Enzyme Action: Testing Catalase Activity
Enzyme Action: Testing Catalase Activity Many organisms can decompose hydrogen peroxide (H 2 O 2 ) enzymatically. Enzymes are globular proteins, responsible for most of the chemical activities of living
Osmosis. Computer OBJECTIVES
Osmosis Computer 22 In order to survive, all organisms need to move molecules in and out of their cells. Molecules such as gases (e.g., O 2, CO 2 ), water, food, and wastes pass across the cell membrane.
Evaluation copy. Heart Rate as a Vital Sign. Computer OBJECTIVES
Heart Rate as a Vital Sign Computer 3 Since the earliest days of medicine, heart rate has been recognized as a vital sign (an indicator of health, disease, excitement, and stress). Medical personnel use
Evaluation copy. Heart Rate Response to Baroreceptor Feedback. Computer
Heart Rate Response to Baroreceptor Feedback Computer 5 One of the homeostatic mechanisms of the human body serves to maintain a fairly constant blood pressure. Major determinants of blood pressure are
Heart Rate and Blood Pressure as Vital Signs
Heart Rate and Blood Pressure as Vital Signs Computer 10 Since the earliest days of medicine heart rate has been recognized as a vital sign an indicator of health, disease, excitement, and stress. Medical
Enzyme Action: Testing Catalase Activity
Enzyme Action: Testing Catalase Activity Pennsylvania Science Standards: S11.A.1.1.4 S11.A.1.3.1 S11.A.2.2.2.1 S11.A.2.2.2.2 Keystone Eligible Content Bio.B.4.1.1, Bio.B.4.1.2, and Bio.B.4.2.5 Introduction
Heart Rate, Blood Pressure, and Exercise. Evaluation copy
Heart Rate, Blood Pressure, and Exercise Computer 11 The adaptability of the heart can be observed during exercise, when the metabolic activity of skeletal muscles increases. The cardiovascular system,
Enzyme Action: Testing Catalase Activity
Enzyme Action: Testing Catalase Activity LabQuest 6A Many organisms can decompose hydrogen peroxide (H 2 O 2 ) enzymatically. Enzymes are globular proteins, responsible for most of the chemical activities
Evaluation copy. Heart Rate and Physical Fitness. Computer OBJECTIVES
Heart Rate and Physical Fitness Computer 27 The circulatory system is responsible for the internal transport of many vital substances in humans, including oxygen, carbon dioxide, and nutrients. The components
Energy Content of Foods
Skills Practice Lab Energy Content of Foods PROBEWARE LAB You are a lab technician working for NASA. Recently you were given the job of deciding what type of foods should be included in the next space
Chemistry 212. Experiment 3 ANALYSIS OF A SOLID MIXTURE LEARNING OBJECTIVES. - learn to analyze a solid unknown with volumetric techniques.
Experiment 3 The objectives of this experiment are to LEARNING OBJECTIVES - learn to analyze a solid unknown with volumetric techniques. - use stoichiometry to determine the percentage of KHP in a solid
AP Biology Unit 1, Chapter 5
AP Biology Unit 1, Chapter 5 Research Question How do abiotic or biotic factors influence the rates of enzymatic reactions? Background Enzymes are the catalysts of biological systems. They speed up chemical
APBiology Unit 1, Chapter 5
APBiology Unit 1, Chapter 5 Research Question How do abiotic or biotic factors influence the rates of enzymatic reactions? Background Enzymes are the catalysts of biological systems. They speed up chemical
1724 Lab: Frog Skeletal Muscle Physiology (Marieb Exercise 16A) Marieb/iWorx / Ziser, 2002
1724 Lab: Frog Skeletal Muscle Physiology (Marieb Exercise 16A) Marieb/iWorx / Ziser, 2002 I. Introduction. Read the introductory material in your lab manual Marieb Ex 16A: Skeletal Muscle Physiology Frog
THE CASE OF THE DRUNK DRIVER; GC APPROACH From Science in Motion, Juniata College
THE CASE OF THE DRUNK DRIVER; GC APPROACH From Science in Motion, Juniata College STANDARDS ADDRESSED 1.2.11.A, 2.4.11.E 3.4.10.A, 3.7.10.A 3.7.12.A INTRODUCTION ON GAS CHROMATOGRAPH Chromatography is
#20 Separation of Alcohols Using Gas Chromatography
#20 Separation of Alcohols Using Gas Chromatography Purpose: The purpose of this experiment is to determine the composition of an unknown alcohol mixture by using gas chromatography. Introduction: A gas
To learn how to use the molar extinction coefficient in a real experiment, consider the following example.
Week 3 - Phosphatase Data Analysis with Microsoft Excel Week 3 Learning Goals: To understand the effect of enzyme and substrate concentration on reaction rate To understand the concepts of Vmax, Km and
A Penny for Your Thoughts: Scientific Measurements and Introduction to Excel
A Penny for Your Thoughts: Scientific Measurements and Introduction to Excel Pre-lab Assignment: Introduction Reading: 1. Chapter sections 1.4 through 1.6 in your course text. 2. This lab handout. Questions:
3 To gain experience monitoring a titration with a ph electrode and determining the equivalence point.
Titrations PURPOSE To determine the concentration of acetic acid in vinegar. GOALS 1 To perform an acid-base titration. 2 To gain experience titrating carefully to a visible endpoint. 3 To gain experience
iworx Sample Lab Experiment AN-1: Membrane Potentials
Experiment AN-1: Membrane Potentials Exercise 1: Impaling Muscle Fibers Aim: To measure the membrane potentials in different muscle fibers. Procedure 1. Look through the microscope; you should see the
EXPERIMENT. Titration of the Weak Acid Potassium Hydrogen Phthalate (KHP)
INTRODUCTION EXPERIMENT Titration of the Weak Acid Potassium Hydrogen Phthalate (KHP) Materials generally considered to possess acidic and/or basic properties are widely distributed in nature and range
BIO 360: Vertebrate Physiology Lab 8b: Electrical activity of muscular contractions
Lab report DUE 3/19 Muscle tissues maintain electrical imbalances, or potentials, across cell membranes by concentrating positive or negative charges on opposite sides of those membranes. These potentials
Preparation of Penicillins by Acylation of 6-Aminopenicillanic acid with Acyl Chlorides Week One: Synthesis
Preparation of Penicillins by Acylation of 6-Aminopenicillanic acid with Acyl Chlorides Week One: Synthesis Wear gloves during this experiment. Dissolve 1.05g of sodium bicarbonate in 12mL of acetone:
LABORATORY INVESTIGATION
LABORATORY INVESTIGATION Recording Electrocardiograms The taking of an electrocardiogram is an almost universal part of any complete physical examination. From the ECG record of the electrical activity
Biopac Student Lab Lesson 6 ELECTROCARDIOGRAPHY (ECG) II Analysis Procedure. Rev
42 Aero Camino, Goleta, CA 93117 www.biopac.com Biopac Student Lab Lesson 6 ELECTROCARDIOGRAPHY (ECG) II Analysis Procedure Rev. 12292017 Richard Pflanzer, Ph.D. Associate Professor Emeritus Indiana University
Identification of Organic Compounds Lab
Identification of Organic Compounds Lab Introduction All organic compounds contain the element carbon (C). Organic compounds usually also contain oxygen (O) or hydrogen (H) or both. They may also contain
Experiment 1: Scientific Measurements and Introduction to Excel
Experiment 1: Scientific Measurements and Introduction to Excel Reading: Chapter 1 of your textbook and this lab handout. Learning Goals for Experiment 1: To use a scientific notebook as a primary record
Experiment 1: Scientific Measurements and Introduction to Excel
Experiment 1: Scientific Measurements and Introduction to Excel Reading: Chapter 1 of your textbook and this lab handout. Learning Goals for Experiment 1: To use a scientific notebook as a primary record
How would you prepare 455 grams of an aqueous solution that is 6.50% sodium sulfate by mass?
62 How would you prepare 455 grams of an aqueous solution that is 6.50% sodium sulfate by mass? Start a concentration calculation by writing the definition of the unit(s) you're using! We know everything
Living with Newton's Laws
Task #1 - Newton s 1 st Law - This is a pain in the neck Let's suppose you are in your car, waiting at a stop light. Like any good driver, you have your seat belt buckled. (It's the law.) Suddenly, a car
Cambridge International Examinations Cambridge International General Certificate of Secondary Education
*2994000068* Cambridge International Examinations Cambridge International General Certificate of Secondary Education COMBINED SCIENCE 0653/63 Paper 6 Alternative to Practical May/June 2014 1 hour Candidates
SAFETY GOGGLES MUST BE WORN AT ALL TIMES!
SUGAR ME UP, DUDE! PURPOSE: To determine the density of five sugar reference solutions To determine the density of your two beverages, using the references as a guide To graph density versus percent sucrose
Exercise 2: Effects of Cold Temperature Aim: To record changes in heart rate after the heart is bathed in cold Ringer s solution.
Experiment AM-3: Heart Muscle Warning: The heart preparation used in this experiment is functional for a limited period of time. If the muscle is bathed periodically in Ringer s solution, it will work
BIOLOGY 1101 LAB 1: OSMOSIS & DIFFUSION. READING: Please read pages & in your text prior to lab.
BIOLOGY 1101 LAB 1: OSMOSIS & DIFFUSION READING: Please read pages 27-31 & 83-86 in your text prior to lab. INTRODUCTION: All living things depend on water. A water molecule is made up of an oxygen atom
Titration of Synthesized Aspirin A continuation of the aspirin synthesis lab
Titration of Synthesized Aspirin A continuation of the aspirin synthesis lab In this lab, you will determine the percent purity of your product from the aspirin synthesis using an acid-base titration.
MiSP ENZYME ACTION Teacher Guide, L1 - L3. Introduction
MiSP ENZYME ACTION Teacher Guide, L1 - L3 Introduction The subject of this unit, enzymes, is typically a high school topic and is studied in depth in Advanced Placement Biology. Even so, it can be successfully
Grip Strength and Muscle Fatigue JB19
Grip Strength and Muscle Fatigue JB19 Skeletal muscle is composed of bundles of individual muscle fibers (see Figure 1) and has unique properties which allow it to respond to stimuli by contracting. Individual
What Is the Relationship Between the Amount of Transmitted Light Through a Solution and Its Concentration?
What Is the Relationship Between the Amount of Transmitted Light Through a and Its Concentration? Blue Food Dye Treats Spine Injury in Rats HTTP://WWW.WIRED.COM/WIREDSCIENCE/2009/07/BLUERATS/ BY HADLEY
Toxicity testing. Introduction
Toxicity testing Lab. Objective: To familiarize the student with the concepts and techniques of bioassay utilized in toxicity testing. To introduce students to the calculation of LC 5 values. Toxicity
Lab #3 Potentiometric Titration of Soda Ash (after Christian, p , p ) (phenolphthalein)
Lab #3 Potentiometric Titration of Soda Ash (after Christian, p.692-694, p.718-720) I: INTRODUCTION In this lab, an unknown sample of soda ash (a crude mixture of sodium carbonate) will be titrated with
Burning Snacks in Chem Lab Michael Hayes Hopewell High School Hopewell City Public Schools
Science Science CH.1, CH.3, CH.5 Laboratories Experiential Learning This lesson uses graphing calculators and word processing software to facilitate student use of technology to determine the energy content
CCMR Educational Programs
CCMR Educational Programs Title: Date Created: July 21, 2006 Author(s): Appropriate Level: Abstract: Time Requirement: Frank La Gatta Esterfication Regents and Honors Chemistry An ester is produced when
Exercise 1: Eye-Hand Reaction Times Aim: To measure the reaction time of a subject to a visual cue when responding with the hand.
Experiment HN-4: Hand vs. Foot Reactions Exercise 1: Eye-Hand Reaction Times Aim: To measure the reaction time of a subject to a visual cue when responding with the hand. Procedure 1. Instruct the subject
LAB: DIFFUSION ACROSS A SELECTIVELY PERMEABLE MEMBRANE
LAB: DIFFUSION ACROSS A SELECTIVELY PERMEABLE MEMBRANE NAME: PERIOD: DATE: Building Background Knowledge: 1) SELECTIVELY PERMEABLE MEMBRANE: Every cell is surrounded by a selectively permeable membrane
Figure HN-5-L1: The Sequence menu containing the preprogramming light sequences used in this experiment.
HN-5: Visual Reflexes and Color Stimulation Exercise 1: Reaction Time and Single Color Visual Cues Aim: To measure the reaction time of a subject to a visual cue. Procedure 1. Instruct the subject to:
Mouse C-Peptide ELISA Kit
Mouse C-Peptide ELISA Kit Cat.No: DEIA4507 Lot. No. (See product label) Size 96T Intended Use The Mouse C-Peptide ELISA kit is for the quantitative determination of c-peptide in mouse serum, plasma, and
TRATION: ANALYSIS OF SODIUM HYDROXIDE
Experiment 8 Name: 22 Ti TRATION: ANALYSIS OF SODIUM HYDROXIDE In this experiment, you will learn the concept and technique of titration. You will use a chemical standard (potassium hydrogen phthalate)
TITLE OF LAB: Effects of Temperature and Solvents on the Cell Membrane
SOTM LAB: B14 12/99 I. TEACHER NOTES & GUIDELINES TITLE OF LAB: Effects of Temperature and Solvents on the Cell Membrane DEVELOPERS OF LAB: Adapted by James Kirby JD726, Jennifer Mortellaro JD449, and
FT-302 Force Transducer
Technical Note FT-302 LabScribe is a trademark of 2015 Overview The FT-302 is a high-sensitivity dual-range research grade force transducer designed to measure forces in the 0.005 to 10 gram and 0 to 100
Solution Molecular Weight of Small Molecules *
OpenStax-CNX module: m43553 1 Solution Molecular Weight of Small Molecules * Tawana Robinson Andrew R. Barron This work is produced by OpenStax-CNX and licensed under the Creative Commons Attribution License
Biochemical Analysis of Plant Enzymes
EDVOTEK P.O. Box 1232 West Bethesda, MD 20827-1232 The Biotechnology Biochemical Analysis of Plant Enzymes 904 EDVO-Kit # Storage: Store entire experiment in the refrigerator. Experiment Objective: In
The Great Peanut Problem
The Great Peanut Problem Calorimetry SCIENTIFIC Introduction All human activity requires burning food for energy. How much energy is released when food burns in the body? How is the calorie content of
LAB: DIFFUSION ACROSS A SELECTIVELY PERMEABLE MEMBRANE
LAB: DIFFUSION ACROSS A SELECTIVELY PERMEABLE MEMBRANE NAME: PERIOD: DATE: Building Background Knowledge: 1) SELECTIVELY PERMEABLE MEMBRANE: Every cell is surrounded by a selectively permeable membrane
ELECTROMYOGRAM ANALYSIS OF MUSCLE FUNCTION INTRODUCTION
ELECTROMYOGRAM ANALYSIS OF MUSCLE FUNCTION STANDARDS: 3.3.10.B - Explain cell functions and processes in terms of chemical reactions and energy changes. 3.3.12.B - Evaluate relationships between structure
Name: Bio A.P. Lab Diffusion & Osmosis
Name: Bio A.P. Lab Diffusion & Osmosis BACKGROUND: Many aspects of the life of a cell depend on the fact that atoms and molecules are constantly in motion (kinetic energy). This kinetic energy results
Determining the Concentration of Iron in Vitamin Supplements
Teacher Guide Determining the Concentration of Iron in Vitamin Supplements Background Information Colorimetry is the science of measuring color. Colorimetry is a useful technique for determining the concentration
The Hydrogen Peroxide Breakdown
Biology The Hydrogen Peroxide Breakdown Examining Factors That Affect the Reaction Rate of Enzymes MATERIALS AND RESOURCES EACH GROUP aprons 2 beakers, 50 ml calculator, graphing forceps goggles graduated
Observing Respiration
Chapter 9 Cellular Respiration Design an Experiment Observing Respiration Introduction Cellular respiration occurs in all living things. During this process, animals take in oxygen and release carbon dioxide
Experiment HH-3: Exercise, the Electrocardiogram, and Peripheral Circulation
Experiment HH-3: Exercise, the Electrocardiogram, and Peripheral Circulation Exercise 1: The ECG and the Pulse in a Resting Subject Aim: To measure and correlate the ECG and the pulse in a resting individual.
Preparation and Comparison of Soaps Minneapolis Community and Tech. College C1152 Principles of Chemistry II v.5.10
Preparation and Comparison of Soaps Minneapolis Community and Tech. College C1152 Principles of Chemistry II v.5.10 Name Introduction Vegetable oil, like all animal and vegetable fats, are made up of a
EHA Physiology: Challenges and Solutions Lab 1 Heart Rate Response to Baroreceptor Feedback
Group No. Date: Computer 5 Names: EHA Physiology: Challenges and Solutions Lab 1 Heart Rate Response to Baroreceptor Feedback One of the homeostatic mechanisms of the human body serves to maintain a fairly
Experimental Procedure
1 of 7 9/12/2018, 2:19 PM https://www.sciencebuddies.org/science-fair-projects/project-ideas/humbio_p043/human-biology-health/iron-rich-foods (http://www.sciencebuddies.org/science-fair-projects /project-ideas/humbio_p043/human-biology-health/iron-rich-foods)
Experiment HM-7: Electromyogram (EMG) Activity in Antagonistic Muscles and Range of Motion
Experiment HM-7: Electromyogram (EMG) Activity in Antagonistic Muscles and Range of Motion Exercise 1: Antagonistic Muscles in Forearm Aim: To study the EMG activity in muscles that work in opposition
Objectives. 2 To compare human body mass with blood volume. 2 To estimate your own volume of blood
. Objectives 2 To compare human body mass with blood volume 2 To estimate your own volume of blood Activity 11 2 To interpolate and extrapolate from best-fit models 2 To predict amounts of various blood
Module 4: Effect of Alcohol on Worms
Module 4: Effect of Alcohol on Worms Michael Dunn Capuchino High School Gregory Chin, Ph.D. BABEC Introduction Alcohol is a drug that affects the nervous system of many animals. The type of alcohol that
Carbohydrates Chemical Composition and Identification
Carbohydrates Chemical Composition and Identification Introduction: Today, scientists use a combination of biology and chemistry for their understanding of life and life processes. Thus, an understanding
PATIENT INSTRUCTIONS FOR USE SINGLE- DOSE PREFILLED SYRINGE
PATIENT INSTRUCTIONS FOR USE EXEMPTIA TM (ADALIMUMAB) SINGLE- DOSE PREFILLED SYRINGE Do not try to inject EXEMPTIA TM yourself until you have been shown the right way to give the injections and have read
Determining the Molecular Mass of an Unknown Acid by Titration
Determining the Molecular Mass of an Unknown Acid by Titration Objectives: To perform an analytical titration. To standardize a basic solution. To determine the equivalent mass of an unknown acid. Background:
Beverage Density Lab Sugar Content Analysis (Due Nov. 11)
Beverage Density Lab Sugar Content Analysis (Due Nov. 11) Introduction: Nutritionists have recently raised concerns about the increasing popularity of sodas, fruit drinks and other beverages dur to their
Method (6 to 1000 µg/l Chlorine as Cl 2 ) Digital Titrator
, ABT, DT, 10025 Amperometric Back Titration 1 Scope and Application: For drinking water and wastewater; USEPA accepted for reporting 1 Procedure is equivalent to Standard Method (18th ed.) 4500-Cl C for
An Experimental Approach to the Effect of Fluids Tonicity on Osmosis Using Molasses, Corn Syrup and Pancake Syrup
An Experimental Approach to the Effect of Fluids Tonicity on Osmosis Using Molasses, Corn Syrup and Pancake Syrup Spring 2019 By Franklin S Carman III, Ph.D., Professor of Biophysical Sciences Carson City
LAB 04 Diffusion and Osmosis
LAB 04 Diffusion and Osmosis Objectives: Describe the physical mechanisms of diffusion and osmosis. Understand the relationship between surface area and rate of diffusion. Describe how molar concentration
Warning: Avoid putting the tip of the syringe needle too deeply into the hole to avoid damage to the heart tissue.
Experiment AM-12: Crayfish Electrocardiogram (ECG) Exercise 1: The Crayfish ECG and Heart Rate Aim: To record the electrical trace (ECG) produced by the contraction of a resting heart, and to determine
Problem: What would happen to enzyme activity if enzymes are placed outside their normal conditions? Hypothesis:
Name: Date: Period: Honors Biology: Enzyme Lab Background information What would happen to your cells if they made a poisonous chemical? You might think that they would die. In fact, your cells are always
Activity # 4. Measurement of Enzyme Activity
Activity # 4. Measurement of Enzyme Activity Adapted from Experimental Molecular Biology Lab Manual, Stephen H. Munroe, Marquette University Week 1 Protein Extraction, Concentration Measurement & Instrument
For Examiner s Use Total EMPA mark Surname. Candidate. Number. Other Names
Centre Number Candidate Number For Examiner s Use Total EMPA mark Surname Other Names Notice to Candidate. The work you submit for assessment must be your own. If you copy from someone else or allow another
Morinaga Mouse C-peptide ELISA Kit
Morinaga Mouse C-peptide ELISA Kit For the quantitative determination of C-peptide in mouse serum, plasma, and fluid 96wells For Laboratory Use Only, not for use in diagnostic procedure Please read full
EXPERIMENT 9 LIPIDS: DETERMINATION OF FAT IN FRENCH FRIES. a fat molecule. Materials Needed
EXPERIMENT 9 LIPIDS: DETERMINATIN F FAT IN FRENCH FRIES Materials Needed French fries or potato chips 1 capillary tube dichloromethane boiling stones 2 Pasteur pipets 1 watch glass Br 2 /CCl 4 solution
DIFFUSON AND OSMOSIS INTRODUCTION diffusion concentration gradient. net osmosis water potential active transport
DIFFUSON AND OSMOSIS NAME DATE INTRODUCTION The life of a cell is dependent on efficiently moving material into and out of the cell across the cell membrane. Raw materials such as oxygen and sugars needed
Bio-logic AuDX PRO FLEX Screening tympanometry and audiometry Quick start guide
AuDX PRO FLEX Screening tympanometry and audiometry Quick start guide Doc. No.7-26-1374-EN/00 Part No.7-26-13704-EN Natus Medical Denmark ApS. +45 45 75 55 55. otoinfo@natus.com Natus Medical Incorporated.
Medescan Nebuliser Med - S600A Instructions Manual
Medescan Nebuliser Med - S600A Instructions Manual Please read this guidebook carefully before operating this unit Your Nebuliser is intended for use in the treatment of asthma, COPD and other respiratory
Lab 4: Osmosis and Diffusion
Page 4.1 Lab 4: Osmosis and Diffusion Cells need to obtain water and other particles from the fluids that surround them. Water and other particles also move out of cells. Osmosis (for water) and diffusion
4. 10/09/14 Ch. 5: Populations /22/14 Ch. 2: Chemistry of Life 55
Table of Contents # Date Title Page # 1. 1 2. 09/02/14 Ch. 1: The Science of Biology 09/16/14 Ch. 4: Ecosystems and Communities 17 3. 09/23/14 Ch. 3: The Biosphere 26 4. 10/09/14 Ch. 5: Populations 45
Grip Strength and Muscle Fatigue
Anatomy & Physiology Foothill High School Grip Strength and Muscle Fatigue Skeletal muscle is composed of bundles of individual muscle fibers (see Figure 1) and has unique properties which allow it to
iworx Sample Lab Experiment HC-3: Pulse Wave Velocity
Experiment HC-3: Pulse Wave Velocity Exercise 1: The Pulse Wave Velocity at Rest Aim: To measure the pulse wave velocity in a resting individual. Procedure 1. Click on the Record button, located on the
Exploring Mitosis Lab IMPORTANT LEARNING OBJECTIVES INTRODUCTION cell cycle interphase division (mitosis)
Exploring Mitosis Lab Today s lab will give you a chance to get an up-close view of mitosis, the process by which eukaryotic cells divide to generate identical daughter cells. We re using garlic (A. sativium)
Macromolecules. Lab Exercise 4. Contents. Objectives. Introduction
Lab Exercise Macromolecules Contents Objectives 1 Introduction 1 Activity.1 Colorimetric Tests 2 Activity.2 Chromatography Resutls Section 6 Objectives - Know the building blocks of proteins, carbohydrates
You can use this app to build a causal Bayesian network and experiment with inferences. We hope you ll find it interesting and helpful.
icausalbayes USER MANUAL INTRODUCTION You can use this app to build a causal Bayesian network and experiment with inferences. We hope you ll find it interesting and helpful. We expect most of our users
Experiment HH-2: The Electrocardiogram and Heart Sounds
Experiment HH-2: The Electrocardiogram and Heart Sounds Exercise 1: The ECG in a Resting Subject Aim: To measure the ECG in a resting individual. Procedure 1. Click on the Record button, located on the