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A 3% solution of sulfuric acid was mixed with an 18% solution of sulfuric acid to produce an 8%solution. How much 3% solution and how much 18% solution were used to produce 15 L of 8% solution?

 Sep 15, 2021
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Let the number of Liters of 3% solution==T

Then the number of Liters of 18% solution ==15 - T

 

0.03T +  0.18[15 -  T]==0.08 * 15

0.03T +  2.7  -  0.18T ==1.2

0.18T  -  0.03T ==2.7 - 1.2

0.15T ==1.5

T ==1.5 /0.15 ==10 Liters of 3% solution.

15  -  10  ==5 Liters of 18% solution.

 Sep 15, 2021

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