Acids

70% acid made from the same acid of two different concentrations. Amount weaker acid to the stronger acid is in ratio 2:1.

What was the concentration of the weaker acid if stronger had 91% concentration?

Correct answer:

c =  59.5 %

Step-by-step explanation:

ab=21 ac+b0.91=0.7(a+b)  2c+10.91=0.7(2+1) c=0.595=59.5%



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