SOLUTION: You need a 90% alcohol solution. On hand, you have a 30 mL of a 40% alcohol mixture. How much pure alcohol will you need to add to obtain the desired solution?

SOLUTION: You need a 90% alcohol solution. On hand, you have a 30 mL of a 40% alcohol mixture. How much pure alcohol will you need to add to obtain the desired solution?

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Question 788888: You need a 90% alcohol solution. On hand, you have a 30 mL of a 40% alcohol mixture. How much pure alcohol will you need to add to obtain the desired solution?
Answer by josgarithmetic(39618) (Show Source): You can put this solution on YOUR website!
v = volume in milliliters of the pure alcohol to add.

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