SOLUTION: How much of an 18% solution of sulfuric acid should be added to 360 mL of a 10% solution to obtain a 15% solution? Thank you for all your help.

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Question 327218: How much of an 18% solution of sulfuric acid should be added to 360 mL of a 10% solution to obtain a 15% solution? Thank you for all your help.
Answer by Fombitz(32388) About Me  (Show Source):
You can put this solution on YOUR website!
Let X be the amount of 18% solution.
18X%2B10%28360%29=15%28X%2B360%29
18X%2B3600=15X%2B5400
3X=1800
highlight_green%28X=600%29
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600 ml of 18% solution.