SI Session #2 WS - gg5g PDF

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GEN CHEM 2 SI HANDOUT LEADER: Sanjay Srikanth DATE: 1/28/2021 Review Question: 1. What is the molality of a 2.75 M pentane (C5H12, mm = 72.15 g/mol) solution whose density is 0.631 g/mL?

Solutions pt.2 (60 min): 1. What is the expected van’t Hoff factor for an aqueous potassium sulfate solution?

2. The  solubility of CO2 in water at 38°C and 1 atm is 0.023 mol L-1  . What is its solubility under atmospheric conditions at 38°C? (The partial pressure of CO2 in the air is 0.00040 atm.)

3. When  25.2 grams of HCl (molar mass = 36.458 g mol-1  ) was dissolved in 246. grams of water, the freezing point of the solution was –8.5°C. What is the experimental value of the van‘t Hoff factor for HCl?

4. What is the boiling point of a solution prepared by dissolving 51.6 grams of glucose, (molar mass = 180.2 g mol–1  ) a non-volatile, molecular solute, in 126. grams of ethanol, C2H5OH?

5. Two volatile liquids "A" and "B" form a solution whose mole fraction vs. vapor pressure sketch (25°C) is shown below. An equimolar mixture of liquids A and B are placed in a closed container (25°C). At equilibrium, the vapor above the mixture will be:

a.) 50% A b.) >50% A c.)...