CBSE Class 10 Answered
Five liters of 31.2% acid solution has to be made out of a 40% and a 18% acid solution. How many litres of each of the 40% and 18% solution need to be mixed?
Asked by Joshua | 19 Aug, 2012, 01:00: PM
Expert Answer
If x is the amount of 18% solution, then there must be 5-x liters of 40% solution, since the total volume is 5 liters.
Now, we have:
.18x + .40(5-x) = .312(5)
.18x + 2 - .4x = 1.56
.22x = .44
x = 2
so, 2L of 18% and 3L of 40% will produce 5L of 31.2%
Now, we have:
.18x + .40(5-x) = .312(5)
.18x + 2 - .4x = 1.56
.22x = .44
x = 2
so, 2L of 18% and 3L of 40% will produce 5L of 31.2%
Answered by | 19 Aug, 2012, 11:44: PM
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