A solution contains 100.0 g water,10.0 g NaCl,and 15.0 g methanol.What is the mass percent of methanol in the solution?

Question

Quizplus · Accepted Answer

To find the mass percent of methanol, we need to determine the total mass of the solution first.

Total mass of solution = 100.0 g (water) + 10.0 g (NaCl) + 15.0 g (methanol) = 125.0 g

Mass percent of methanol = (mass of methanol / total mass of solution) x 100%

Mass percent of methanol = (15.0 g / 125.0 g) x 100% = 12.0%

Therefore, the mass percent of methanol in the solution is 12.0%. The best choice is C.

A Solution Contains 100