Hydrochloric acid

Determine the concentration of which must have a solution of hydrochloric acid that mixing 10 l of the solution with 8 liters of 26% solution to get the solution with a concentration of 50%?

Correct result:

x =  69.2 %

Solution:


10•x/100+8•0.26=0.50•(10+8)

10x = 692

x = 346/5 = 69.2

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