Nitric acid

We want to prepare 200 g of 30% nitric acid. We have enough 12% and 60% of this acid. How many of which will we need?

Correct answer:

a =  125 g
b =  75 g

Step-by-step explanation:

m=200 g c1=12%=10012=253=0.12 c2=60%=10060=53=0.6 c=30%=10030=103=0.3  a+b=m c1 a+c2 b=c m a+b=200 0.12 a+0.6 b=0.3 200  a+b=200 0.12a+0.6b=60  Row20.12 Row1Row2 a+b=200 0.48b=36  b=0.4836=75 a=200b=20075=125=125 g  a=125 b=75

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