Question

1. Vodka is advertised to be 80 proof, which is 40% by volume of ethanol, C2H5OH. Assuming the density of the solution is 1.0 g/mL and the density of ethanol is 0.789 g/mL. If the solution is at 25oC, what is the vapor pressure of water over the solution?

2. Calculate the molarity and molality of a solution of 50 grams of ethanol, C2H5OH (density = 0.789 g/mL) which is dissolved in 200 mL of water (density = 1.00 g/mL).​​

Answer 1