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7 L of an acid solution was mixed with 3 L of a 15% acid solution to make a 29% acid solution. Find / 3 the percent concentration of the first solution

 

 Jul 23, 2020
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 Let the percentage of 7 L of acid solution =P
7*P/100 + 0.15*3 =0.29*[7 + 3]
0.07P + 0.45 =2.9
0.07P =2.9 - 0.45 =2.45
P =[2.45 / 7 ]  x 100
P = 35 % - Percentage of acid in the 7 L solution.

 Jul 23, 2020
edited by Guest  Jul 23, 2020

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