500 mL of salt water is prepared by dissolving 20 g of salt in water. What is the %(w/v) of this solution?
A) 0.04%
B) 0.4%
C) 4.0%
D) 40.0%

Question

Quizplus · Accepted Answer

%(w/v) = (mass of solute ÷ volume of solution) × 100%

mass of solute = 20 g
volume of solution = 500 mL

%(w/v) = (20 ÷ 500) × 100%
%(w/v) = 0.04 × 100%
%(w/v) = 4.0%

Therefore, the %(w/v) of the salt water solution is 4.0%, which is option C.

500 ML of Salt Water Is Prepared by Dissolving 20