Question

How many grams of a stock solution that is 87.0 percent H2SO4 by mass would be needed to make 200 grams of a 35.5 percent by mass solution? Show all of the work needed to solve this problem

Answer 1

Answer:-

81.609 grams

Explanation:-

In a 35.5% by mass solution of 200 grams

Amount of H2SO4 = 200 x 35.5/100

= 71 grams

Let the amount of stock solution required be G grams

So 87% of G grams should have the same amount of H2SO4 by mass as 71 grams.

∴ G x 87/100 = 71

G = 71 x 100/87

= 81.609 grams