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- How many litres of a 90% of concentrated acid needs to be mixed with a 75% Solution of concentrated acid to get a 30 liter Solution of 78% concentrated acid?
Question 1:
How many litres of a 90% of concentrated acid needs to be mixed with a 75% Solution of concentrated acid to get a 30 liter Solution of 78% concentrated acid? A. 8
B. 9
C. 7
D. 6
Feedback The concentration is given which is wrt 100, hence we can take x lt of 90% and (30-x)of 75% x*90 + (30-x)*75 = 30*78 hence the ans is 6 liters.
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