Question

I need help with my homework number 14 can you please tell me how to solve it?

Answer 1

We want to prepare 185. g of a 7.29 % by mass.

% by mass means:

grams of solute ------ 100 grams of solution

Solute = NaBr

Procedure:

7.29 % by mass:

7.29 g NaBr ------ 100 g solution

X ------ 185. g solution

X = 185. g solution x 7.29 g NaBr/100 g solution = 13.48 g = 13.5 g approx.

Answer: 13.5 g NaBr