SOLUTION: Hi, My question is: How many milliliters (mL) of water must be added to 10 milliliters of a 30%-sulfuric acid solution to make a 15%-sulfuric acid solution? Thanks

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Question 732581: Hi,
My question is:
How many milliliters (mL) of water must be added to 10 milliliters of a 30%-sulfuric acid solution to make a 15%-sulfuric acid solution?

Thanks
Answer by lokesh mishra(5) About Me  (Show Source):
You can put this solution on YOUR website!
since in 10 milimeters 3 ml is sulphuric acid , let x ml be added ,(10 +x) 85/100 = (7+x) , 140 + 20x = 170 + 17x , 3x = 30 , x = 10 ml , of water sud b added