SOLUTION: To generate hydrogen in a chemical lab, a 40% solution of Sulphuric acid is needed. You have 50ml of an 86% solution of sulphuric acid. How many ml of water should be added to dilu

Question 159478: To generate hydrogen in a chemical lab, a 40% solution of Sulphuric acid is needed. You have 50ml of an 86% solution of sulphuric acid. How many ml of water should be added to dilute the solution to the required 40% sulphuric acid?
Answer by josmiceli(19441) (Show Source): You can put this solution on YOUR website!
In words:
(ml of acid in 86% solution)/(ml of 86% solution + added water) = 40%
Let = the ml of water to be added
The ml of sulphuric acid in 50 ml of 86% solution is:
ml

Multiply both sides by

ml
57.5 ml of water must be added to get a 40% solution
check:

OK
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