Suppose you prepare a solution by mixing a known volume of ethanol (density = 0.789 g/mL) with a known volume of water (density = 1.00 g/mL). Which of the following can be determined from the information given?
A) %(w/w)
B) %(w/v)
C) Both a and b can be determined.
D) Neither a nor b can be determined.

Question

Quizplus · Accepted Answer

The densities of the two liquids alone do not provide enough information to determine the percent composition of the solution. Additional information, such as the masses of the liquids before mixing or the final concentration of the solution, would be needed to solve for %(w/w) or %(w/v).

Suppose You Prepare a Solution by Mixing a Known Volume