SOLUTION: A chemist mixed 18ml of 10% sulfuric acid with water to produce a mixture of 5%. How much was mixed with the acid?

Question 990906: A chemist mixed 18ml of 10% sulfuric acid with water to produce a mixture of 5%. How much was mixed with the acid?
Found 2 solutions by Alan3354, lwsshak3:
Answer by Alan3354(69443) (Show Source): You can put this solution on YOUR website!
A chemist mixed 18ml of 10% sulfuric acid with water to produce a mixture of 5%. How much was mixed with the acid
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The concentration of water is 0%
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5% is the average of 10% and 0% --> equal amounts.

Answer by lwsshak3(11628) (Show Source): You can put this solution on YOUR website!
A chemist mixed 18ml of 10% sulfuric acid with water to produce a mixture of 5%. How much was mixed with the acid?
let x=amt of water to mix with the acid
18*10%+x=(18+x)*5%
1.8+x=0.9+.05x
0.95x=0.9
x=0.947
amt of water to mix with the acid=0.947 ml
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