What is the percent-by-mass concentration of NaCl in a solution that is prepared by adding 14.0 g of NaCl to 75.0 g of water?
A)61.0%
B)15.7%
C)18.7%
D)24.0%
E)5.36%

Question

Quizplus · Accepted Answer

The percent-by-mass concentration is calculated by dividing the mass of the solute (NaCl) by the total mass of the solution (NaCl + water) and then multiplying by 100. Here, it's (14.0 g / (14.0 g + 75.0 g)) * 100 = (14.0 / 89.0) * 100 ≈ 15.7%.

What Is the Percent-By-Mass Concentration of NaCl in a Solution