Compute the vapor pressure of water

Reference no: EM13184405

1. An isotonic solution contains 0.94% NaCl by mass per volume. Calculate the percent mass per volume for isotonic solutions containing each of the following solutes at 25?C. Assume a van't Hoff factor of 1.9 for all ionic solutes.

A. KCl

B. NaBr

C. Glucose

2. A solution of a nonvolatile solute in water has a boiling point of 376.0K .

A. Calculate the vapor pressure of water above this solution at 338 K. The vapor pressure of pure water at this temperature is 0.2467 atm

3. A solution of 49.5% H2SO4 by mass has a density of 1.39 g/cm3 at 293 K. A 25.6cm3 sample of this solution is mixed with enough water to increase the volume of the solution to 99.0cm3 .

A. Find the molarity of sulfuric acid in the obtained solution.

4. A solution contains 11.00g of unknown compound dissolved in 50.0 mL of water. (Assume a density of 1.00 g/mL for water.) The freezing point of the solution is -3.46?C. The mass percent composition of the compound is 60.98% C, 11.94% H, and the rest is O.

A. What is the molecular formula of the compound?

Reference no: EM13184405

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