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LAB 2A SEPARATION OF LIQUIDS BY SIMPLE DISTILLATION ANALYSIS BY GAS CHROMATOGRAPHY LAB 2A Pre-Lab Questions...
Heat of Vaporization and Intermolecular Forces Pre-Lab Section Number Date: PRE-LAB QUESTIONS Show all work for...
Heat of Vaporization and Intermolecular Forces Pre-Lab Section Number Date: PRE-LAB QUESTIONS Show all work for full credit. 1. For the following liquids: methanol, 2-propanol, n-hexane, acetone, and water, (a) write the molecular formula; (b) draw a Lewis structure for each compound; and (c) calculate the molecular weight of each compound. (Copy your work into your lab notebook for use during and after your lab experiment.) 9 | Heat of Vaporization and Intermolecular Forces: Pre-Lab
Post Lab Questions Fermentation: 1. What physical property enables one to use distillation for the separation...
Post Lab Questions Fermentation: 1. What physical property enables one to use distillation for the separation of ethyl alcohol enriched from the water mixture? 2 What is an Azeotrope? Explain how can azeotropes be used to purify mixtures? 3. Azeotropes are also defined as liquid mixtures having a vapor pressure at constant temperature, as a function of composition. Explain with your own words why vapor pressure depends on the composition of the mixture. 4 If the distillation temperature is different...
Pre-lab questions 1. What is the basis for separation of compounds using distillation? Why is it...
Pre-lab questions 1. What is the basis for separation of compounds using distillation? Why is it possible to separate ethanol from water using distillation? 2. What is the difference between simple and fractional distillation? Why does fractional distillation give a much better separation of substances? 3. When is vacuum distillation used, and why is it used? 4. What is an azeotrope? How does this apply to the separation we are doing in this experiment? 5. What intermolecular forces are being...
these questions are in reference to gel filtration chromatography Fost lab questions on lab 8: Analysis...
these questions are in reference to gel filtration
chromatography
Fost lab questions on lab 8: Analysis of Laboratory Results 1. If the following mix of molecules were parified using sine exclusion chromatography, what would be the 6 WI onder in which the molecules pass chrough the opening in the bottom of the column? Mixture containingR hemoglobin, 65,000 daltons; myoglobin, 17,000 daltons; myosin, 180,000 daltons. rhe tw First molecule to appear Second molecule to appear Third molecule to appear 2. Ifa...
What is the main purpose of running a column chromatography? Similar to TLC. column chromatography is...
What is the main purpose of running a column chromatography? Similar to TLC. column chromatography is based on analytes being partitioned between a stationary phase (not moving) and a mobile phase (moving). What is most commonly used as stationary phase in a column? Is this material polar or non-polar? In this experiment, you will use different solvents to run column chromatography separation of different pigments extracted from spinach leaves. These solvents are a mixture of acetone and hexanes. (a) What...
EXPERIENT 3: SEPARATION OF A SOLID MIXTURE PRE-LABORATORY QUESTIONS : The following preparatory questions should be...
EXPERIENT 3: SEPARATION OF A SOLID MIXTURE PRE-LABORATORY QUESTIONS : The following preparatory questions should be answered before coming to lab. They : are intended to introduce you to several ideas that are important to aspects of the experiment. You must turn in your work to your instructor before you will be : allowed to begin the experiment. 1. What is the difference between a homogeneous and heterogeneous mixture? In the experiment, you are going to separate a solid mixture...
Lab Day 8: Chromatography Prelab Questions 1) The basic food colors you can buy are red,...
Lab Day 8: Chromatography Prelab Questions 1) The basic food colors you can buy are red, blue areen, and yellow. Think about what you know about colors and predict which of these might be a single colored compound and which ones might contain more than one. write down your prediction. If you have the colors listed and want a purple color, what would you do? 2) Put the following chromatography solvents in order of polarity as a chromatography solvent: acetone,...
Need help please. Experiment Five: Simple and Fractional Distillation 1. Calculate the area of the following...
Need help please.
Experiment Five: Simple and Fractional Distillation 1. Calculate the area of the following peak coming off of a GC. 12 2. If you have a binary mixture of carbon tetrachloride and tert-butyl alcohol, which compound should distill over first and why? Be sure to draw out both structures and look up each of their boiling points. 3. For the binary mixture of carbon tetrachloide and tert-butyl alcohol from above, what distillation technique would be most suitable and...
Pre Lab Questions 1. Complete the following table: Compound Acetanilide (A) Benzophenone (B) Mandelic acid (C) Benzi...
Pre Lab Questions 1. Complete the following table: Compound Acetanilide (A) Benzophenone (B) Mandelic acid (C) Benzil (D) Benzoic acid (E) Structure Solubility in hexanes Solubility in ethyl acetate 2. Using the following diagram of a TLC plate, answer the following questions: solvent front a) Which compound is more polar if the stationary phase is silica gel? b) True or False: If the solvent mixture was made less polar, the compounds would move farther. c) Use a ruler and calculate...
Heat of Vaporization and Intermolecular Forces Pre-Lab Section Number Date: PRE-LAB QUESTIONS Show all work for full credit. 1. For the following liquids: methanol, 2-propanol, n-hexane, acetone, and water, (a) write the molecular formula; (b) draw a Lewis structure for each compound; and (c) calculate the molecular weight of each compound. (Copy your work into your lab notebook for use during and after your lab experiment.) 9 | Heat of Vaporization and Intermolecular Forces: Pre-Lab
Pre-lab questions 1. What is the basis for separation of compounds using distillation? Why is it possible to separate ethanol from water using distillation? 2. What is the difference between simple and fractional distillation? Why does fractional distillation give a much better separation of substances? 3. When is vacuum distillation used, and why is it used? 4. What is an azeotrope? How does this apply to the separation we are doing in this experiment? 5. What intermolecular forces are being...
these questions are in reference to gel filtration
chromatography
Fost lab questions on lab 8: Analysis of Laboratory Results 1. If the following mix of molecules were parified using sine exclusion chromatography, what would be the 6 WI onder in which the molecules pass chrough the opening in the bottom of the column? Mixture containingR hemoglobin, 65,000 daltons; myoglobin, 17,000 daltons; myosin, 180,000 daltons. rhe tw First molecule to appear Second molecule to appear Third molecule to appear 2. Ifa...
What is the main purpose of running a column chromatography? Similar to TLC. column chromatography is based on analytes being partitioned between a stationary phase (not moving) and a mobile phase (moving). What is most commonly used as stationary phase in a column? Is this material polar or non-polar? In this experiment, you will use different solvents to run column chromatography separation of different pigments extracted from spinach leaves. These solvents are a mixture of acetone and hexanes. (a) What...
EXPERIENT 3: SEPARATION OF A SOLID MIXTURE PRE-LABORATORY QUESTIONS : The following preparatory questions should be answered before coming to lab. They : are intended to introduce you to several ideas that are important to aspects of the experiment. You must turn in your work to your instructor before you will be : allowed to begin the experiment. 1. What is the difference between a homogeneous and heterogeneous mixture? In the experiment, you are going to separate a solid mixture...
Lab Day 8: Chromatography Prelab Questions 1) The basic food colors you can buy are red, blue areen, and yellow. Think about what you know about colors and predict which of these might be a single colored compound and which ones might contain more than one. write down your prediction. If you have the colors listed and want a purple color, what would you do? 2) Put the following chromatography solvents in order of polarity as a chromatography solvent: acetone,...
Need help please.
Experiment Five: Simple and Fractional Distillation 1. Calculate the area of the following peak coming off of a GC. 12 2. If you have a binary mixture of carbon tetrachloride and tert-butyl alcohol, which compound should distill over first and why? Be sure to draw out both structures and look up each of their boiling points. 3. For the binary mixture of carbon tetrachloide and tert-butyl alcohol from above, what distillation technique would be most suitable and...
Pre Lab Questions 1. Complete the following table: Compound Acetanilide (A) Benzophenone (B) Mandelic acid (C) Benzil (D) Benzoic acid (E) Structure Solubility in hexanes Solubility in ethyl acetate 2. Using the following diagram of a TLC plate, answer the following questions: solvent front a) Which compound is more polar if the stationary phase is silica gel? b) True or False: If the solvent mixture was made less polar, the compounds would move farther. c) Use a ruler and calculate...
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