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Assume that you were assigned BaCl_2 in lab. Your water weighed 20.343 g. Following the procedure...
van't Hoff Factor Chem 202 Freezing Point of Aqueous Solutions Results Experimental freezing point values determined...
van't Hoff Factor
Chem 202 Freezing Point of Aqueous Solutions Results Experimental freezing point values determined from graphs (sce directions on p. 3-5, steps 2,3): Sample Ty measured /°C AT measured / °C Distilled Water (solvent) -0.1°C Follow your instructor's Solution D (Naci) -1.8°C 1.7°C directions for submitting these values Solution G (lalla) -1.0°C 0.9°C before you leave lab! van't Hoff factor values (see directions on p. 3-6, steps 4-5): Solution D Solute Compound Naci Molality 0.505 mol/kg Ideal van't...
Only number 3. Water IN LAB QUESTIONs: What is the actual freezing point depression of your...
Only number 3.
Water IN LAB QUESTIONs: What is the actual freezing point depression of your anti-freeze? Therefore, what is the experimental van't Hoff factor of your solute? How much would it cost to make 2 L of your anti-freeze? POST LAB QUESTIONS 2. Using the knowledge you have gained, determine which of the above solutes would make the best anti-freeze. The best anti-freeze will be a soluble solution, which gives a 20 degree change in freezing point (use experimental...
Post-Lab Material Experiment 19 Data and Calculations: Molar Mass Determination by Depression of the Freezing Point...
Post-Lab Material Experiment 19 Data and Calculations: Molar Mass Determination by Depression of the Freezing Point 0.3 Name Section A. Measured Freezing Point of Pure Water B. Finding the Freezing Point of a Solution of Liquid Unknown Target mass of solute (Calculated based on the parameters in the instructions) Unknown # Liquid 3.5 Actual mass of solute used Trial Freezing point of solution (observed) -3.0 Mass of solution 116.6 Trial II Freezing point of solution -3.3 Mass of solution 101.3....
PLEASE SHOW WORK FOR EACH TABLE CLEARLY AND IN CORRECT ORDER! I WILL GIVE YOU A...
PLEASE SHOW WORK FOR EACH TABLE CLEARLY AND IN CORRECT
ORDER! I WILL GIVE YOU A GOOD RATING IF DONE CLEARLY AND CORRECTLY
:)
DATA:
Sodium chloride
Freezing point of Water (°C)
0.00
Freezing point of NaCl (°C)
-4.40
Mass of solute (g)
5.89
Volume of Solvent, mL
100.0
Sugar
Volume of Solvent, mL
100.0
Freezing point of Sucrose (°C)
-1.70
Mass of solute (g)
34.05
Ethyl alcohol
Freezing point of E.G (°C)
-1.80
Mass of solute (g)
6.202
Volume...
Answer the following questions using complete sentences and support your answers with calculations, if desired. Attach...
Answer the following questions using complete sentences and support your answers with calculations, if desired. Attach additional pages as necessary. Handwritten or typed answers are acceptable. (5 pts per question) 1. Describe in your own words or figures why the addition of non-volatile solutes lower the freezing point of a solvent. 2. If salicylic acid dissociated into two particles when dissolved into myristic acid (it does not), would this change your calculated K value? Explain why. (Hint: look over your...
Separating a Mixture, Recrystallization, pre-lab assignment could you also explain why you chose that substance for...
Separating a Mixture, Recrystallization, pre-lab
assignment
could you also explain why you chose that substance for the empty
spaces and question marks
EXPERIMENT 4 Pre-Lab Assignment Separating a Mixture, Recrystalliration Name Date 1. Complete the following flowchart which shows how to separate a mixture of sand, sodium chloride and acetanilide. Notice that after a separation process (a down arrow) the filtered solids are shown on the left and the filtrate (the liquid) is shown on the right. The terminal step...
Postlab Questions Answer the following questions on a separate sheet or in your lab notebook. Make...
Postlab Questions Answer the following questions on a separate sheet or in your lab notebook. Make sure that the copy page is readable! D) Calculate the percentage yield for both reactions. Show all calculations. 2) What is the color of the reaction at the beginning of reaction? What causes the color? 3) Why do you dissolve maleic acid in diethyl ether and fumaric acid in water? 4) Give the complete reaction mechanisms for the formation of meso and racemic 2,3-...
Experiment Write Up Proposal You will write up a synthesis procedure for one reaction that could...
Experiment Write Up Proposal You will write up a synthesis procedure for one reaction that could be potentially run in a face- to-face Chem 2321 lab session. Your proposal will include an introduction and procedure. The procedure will include step-by-step instructions for running the reaction (including reaction monitoring), work-up. (product isolation and purification), and analysis (characterization). You will need to include sample calculations for percent yield and provide sample spectra analysis. You must upload your proposal as a single document...
EXPERIMENT 9 CHEMICAL REACTIONS: STOICHIOMETRY LABORATORY REPORT Your Name TA's Name You must rea...
EXPERIMENT 9 CHEMICAL REACTIONS: STOICHIOMETRY LABORATORY REPORT Your Name TA's Name You must read pages 69 and 70 to complete the following calculations. Lab Section 1411. Date Trial #1 Trial #2 Trial #3 vol . 0.100 M K2CO, solution -1200 mL 12.00 mL mmole K2CrO vol. 0.100 M Pb(NO,), solution 10.00ml mmole Pb(NO) 12.00m 14.00 mL 20 g mass product+paper 0.579 g0.654 g mass dry filter paper 0266 mass PbCrO, collected precip. 9 mmole Pbcro, CALCULATIONS AND QUESTIONS (USE THE...
van't Hoff Factor
Chem 202 Freezing Point of Aqueous Solutions Results Experimental freezing point values determined from graphs (sce directions on p. 3-5, steps 2,3): Sample Ty measured /°C AT measured / °C Distilled Water (solvent) -0.1°C Follow your instructor's Solution D (Naci) -1.8°C 1.7°C directions for submitting these values Solution G (lalla) -1.0°C 0.9°C before you leave lab! van't Hoff factor values (see directions on p. 3-6, steps 4-5): Solution D Solute Compound Naci Molality 0.505 mol/kg Ideal van't...
Only number 3.
Water IN LAB QUESTIONs: What is the actual freezing point depression of your anti-freeze? Therefore, what is the experimental van't Hoff factor of your solute? How much would it cost to make 2 L of your anti-freeze? POST LAB QUESTIONS 2. Using the knowledge you have gained, determine which of the above solutes would make the best anti-freeze. The best anti-freeze will be a soluble solution, which gives a 20 degree change in freezing point (use experimental...
Post-Lab Material Experiment 19 Data and Calculations: Molar Mass Determination by Depression of the Freezing Point 0.3 Name Section A. Measured Freezing Point of Pure Water B. Finding the Freezing Point of a Solution of Liquid Unknown Target mass of solute (Calculated based on the parameters in the instructions) Unknown # Liquid 3.5 Actual mass of solute used Trial Freezing point of solution (observed) -3.0 Mass of solution 116.6 Trial II Freezing point of solution -3.3 Mass of solution 101.3....
PLEASE SHOW WORK FOR EACH TABLE CLEARLY AND IN CORRECT
ORDER! I WILL GIVE YOU A GOOD RATING IF DONE CLEARLY AND CORRECTLY
:)
DATA:
Sodium chloride
Freezing point of Water (°C)
0.00
Freezing point of NaCl (°C)
-4.40
Mass of solute (g)
5.89
Volume of Solvent, mL
100.0
Sugar
Volume of Solvent, mL
100.0
Freezing point of Sucrose (°C)
-1.70
Mass of solute (g)
34.05
Ethyl alcohol
Freezing point of E.G (°C)
-1.80
Mass of solute (g)
6.202
Volume...
Answer the following questions using complete sentences and support your answers with calculations, if desired. Attach additional pages as necessary. Handwritten or typed answers are acceptable. (5 pts per question) 1. Describe in your own words or figures why the addition of non-volatile solutes lower the freezing point of a solvent. 2. If salicylic acid dissociated into two particles when dissolved into myristic acid (it does not), would this change your calculated K value? Explain why. (Hint: look over your...
Separating a Mixture, Recrystallization, pre-lab
assignment
could you also explain why you chose that substance for the empty
spaces and question marks
EXPERIMENT 4 Pre-Lab Assignment Separating a Mixture, Recrystalliration Name Date 1. Complete the following flowchart which shows how to separate a mixture of sand, sodium chloride and acetanilide. Notice that after a separation process (a down arrow) the filtered solids are shown on the left and the filtrate (the liquid) is shown on the right. The terminal step...
Postlab Questions Answer the following questions on a separate sheet or in your lab notebook. Make sure that the copy page is readable! D) Calculate the percentage yield for both reactions. Show all calculations. 2) What is the color of the reaction at the beginning of reaction? What causes the color? 3) Why do you dissolve maleic acid in diethyl ether and fumaric acid in water? 4) Give the complete reaction mechanisms for the formation of meso and racemic 2,3-...
Experiment Write Up Proposal You will write up a synthesis procedure for one reaction that could be potentially run in a face- to-face Chem 2321 lab session. Your proposal will include an introduction and procedure. The procedure will include step-by-step instructions for running the reaction (including reaction monitoring), work-up. (product isolation and purification), and analysis (characterization). You will need to include sample calculations for percent yield and provide sample spectra analysis. You must upload your proposal as a single document...
EXPERIMENT 9 CHEMICAL REACTIONS: STOICHIOMETRY LABORATORY REPORT Your Name TA's Name You must read pages 69 and 70 to complete the following calculations. Lab Section 1411. Date Trial #1 Trial #2 Trial #3 vol . 0.100 M K2CO, solution -1200 mL 12.00 mL mmole K2CrO vol. 0.100 M Pb(NO,), solution 10.00ml mmole Pb(NO) 12.00m 14.00 mL 20 g mass product+paper 0.579 g0.654 g mass dry filter paper 0266 mass PbCrO, collected precip. 9 mmole Pbcro, CALCULATIONS AND QUESTIONS (USE THE...
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