Question

PART A

How many grams of ethanol, CH3CH2OH, should you dissolve in water to make 0.400 L of vodka (which is an aqueous solution that is 6.86 M ethanol)?

Express your answer with the appropriate units.

PART B

Using the density of ethanol (0.789 g/mL), calculate the volume of ethanol you need to make 0.400 L of vodka.

Express your answer with the appropriate units.

Answer 1

A) Concentration of CH, CH,OH solution = 6.86 M Volume of the solution = 0.400 L Mass of CH, CH, OH present in the solution = 0 4001 6.86 mol CH CH OH 1L 46.1 g = 2.744 mol CH,CH,OHX – 1 mol CH, CH OH = 126 g B) density of ethanol = 0.789 g/mL Volume of the solution = 0.400 L= 400 mL 0.789 g = 315.6 g Mass of density of ethanol = 400 mL x 1 mL 316 g