A chemistry question

Question

What volume (ml) of 23% (m/v) LiCl solution will provide 36 grams of LiCl? Round to one decimal places, do not include units in your answer.

Answer 1

23% (m/v) Li means the solution contains 23 g LiCl per 100 mls of solution. If you want to obtain 36 g of LiCl from this solution, you will obviously need more than 100 mls, right? So, let's use a simple proportion to figure out how much of the solution we will need...

23 g LiCl / 100 mls = 36 g LiCl / xmls

x = 156.5 mls

Answer = 156.5

Solving using dimensional analysis...

36 g LiCl x 100 mls / 23 g LiCl = 156.5 mls

Answer = 156.5