Question

Suppose 75.2 mL of chloroform and 42.2 mL of toluene are mixed, and the final solution has a volume of 121. mL. Note that the density of chloroform is 1.49 g/mL.
Calculate the volume percent of chloroform in this solution.
Be sure your answer has the right number of significant digits.

Answer 1

First, calculate the total mass of the solution using the density of chloroform:
Mass of chloroform = 75.2 mL x 1.49 g/mL = 111.848 g
Mass of toluene = volume of solution - mass of chloroform = 121 mL - 111.848 g = 9.152 g

Next, calculate the volume percent of chloroform in the solution:
Volume percent = (volume of chloroform / total volume of solution) x 100%
Volume percent = (75.2 mL / 121 mL) x 100% = 62.15%

Therefore, the volume percent of chloroform in this solution is 62.15%.