What volume of ethyl alcohol and water must be mixed together to prepare 250ml of 60% by volume of alcohol in water.

Dear Preetham,

60% y volume means 60 ml ethyl alcohol in 100 ml of solution. 

So,Water is 100-60 = 40 ml.

Hence, ethyl alcohol to Water ratio is 60/40 = 3/2

So, in 250 ml solution, 3 parts of 250ml is ethyl alcohol and 2 parts of 250ml is water.

In total, 5 parts makes 250. 

So 1 part is 250/2 = 50 ml.

Hence ethyl alcohol needed is 150ml and water 100ml.

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Updated on: 10-Oct-2022

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