Question

A certain brine has 3.96% NaCl by mass. A 75.0−mL sample weighs 76.7g How many liters of this solution should be evaporated to dryness to obtain 730kg NaCl?

Answer 1

The old molarity formula.
density x mL x %/100 = grams.
The density of the solution is d = mass/volume = 76.7/75.0 = whatever, then
(76.7/75.0) x ? mL x 0.0396 = 730,000
Solve for ?mL and convert to L.

Answer 2

18037.5L

Answer 3

1.83 x 10^4 L