Question

How many grams of a stock solution that is 92.5 percent H2SO4 by mass would be needed to make 250 grams of a 35.0 percent by mass solution
Please show all work.

Answer 1

Answer:-

94.595 grams

Explanation:-

In a 35% by mass solution of 250 grams,

Amount of H2SO4= 250x35/100

= 87.5 grams

Let the required amount of stock solution be G grams.

So 92.5% of G should have the same amount of H2SO4 as 87.5grams.

∴ G x 92.5/100 = 87.5

G = 87.5 x 100/92.5

= 94.595 grams