A 50 ml after-shave lotion at 30% alcohol is mixed with 30 ml of pure water. What is the percentage of alcohol in the new solution?

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Expert Solution

The amount of the final mixture is given by

50 ml + 30 ml = 80 ml

The amount of alcohol is equal to the amount of alcohol in pure water ( which is 0) plus the amount of alcohol in the 30% solution. Let x be the percentage of alcohol in the final solution. Hence

0 + 30% 50 ml = x (80)

Solve for x

x = 0.1817 = 18.75%

Answer is 18.75%

Nipun Maity answered 2 years ago

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