KOH

How many g of 20% KOH solution do we need to mix with 500 g of 30% KOH solution to obtain a 25% KOH solution?

Correct answer:

x =  500 g

Step-by-step explanation:

p1=20%=10020=0.2 p2=30%=10030=0.3 p3=25%=10025=0.25 m2=500 g  x p1+m2 p2=(x+m2) p3 x 0.2+500 0.3=(x+500) 0.25  0.05x=25  x=0.0525=500  x=500=500 g



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