You need a 45% alcohol solution. on hand, you have a 480 ml of a 40% alcohol mixture. you also have 85% alcohol mixture. how much of the 85% mixture will you need to add to obtain the desired solution?

Question

Chemistry

Sonia Coffey

25 March, 02:58

You need a 45% alcohol solution. on hand, you have a 480 ml of a 40% alcohol mixture. you also have 85% alcohol mixture. how much of the 85% mixture will you need to add to obtain the desired solution?

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Answers (1)

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Dennis Wise · Answer 1

x ml of 85% mixture will needed to add

0.40*480 ml alcohol in 480 ml solution (40%)

0.85x alcohol in x ml solution (85%)

0.45 (480 + x) in (480 + x) ml 0.45% solution

0.40*480+0.85x = 0.45 (480 + x)

192+0.85x=216+0.45x

0.85x-0.45x=216-192

0.4x=24

x=24/0.4=60 ml a 45% alcohol solution