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Topic: ethanol and water  (Read 1747 times)

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Offline nujabes

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ethanol and water
« on: November 24, 2015, 05:25:32 PM »
Jim is working in a lab at 293.15 K. He has a solution of pure ethanol but he wants to make a 2L solution of 50% ABV alcohol for drinking. What mass of water and ethanol should he combine?
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Offline mikasaur

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Re: ethanol and water
« Reply #1 on: November 24, 2015, 10:52:17 PM »
Hello and welcome to the forums!

Before we can help you have to show us your attempts to solve the problem. It's part of the forum rules you can read here.

What do you know about the properties of ethanol and water that might help you solve this problem?
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Or you could, you know, Google it.

Offline Enthalpy

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Re: ethanol and water
« Reply #2 on: November 26, 2015, 05:37:24 AM »
The wording probably expects you to add the volumes of water and ethanol. Though, a more accurate computation should mind that this mixture shrinks a little bit. Not huge, but perfectly observable.
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