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Topic: Determine volume problem  (Read 1600 times)

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Offline FrostByte

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Determine volume problem
« on: May 05, 2016, 02:03:24 AM »
I have problem that says
What volume of a 95% alcohol solution should be used to prepare 1000 ml of 50% alcohol.

The answer is 525 ml but I'm not sure how to determine this.
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Offline Dan

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Re: Determine volume problem
« Reply #1 on: May 05, 2016, 03:04:02 AM »
How much alcohol is in 1000 mL of 50% alcohol solution?

How much 95% alcohol contains this amount?

By the way, I get 526 mL.
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Offline Borek

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Re: Determine volume problem
« Reply #2 on: May 05, 2016, 03:08:35 AM »
This is not a good question, as it doesn't define what kind of % - mass or volume - it means (and the answers are different).

Seems like it is about volume %. Follow Dan's advice.
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Offline Enthalpy

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Re: Determine volume problem
« Reply #3 on: May 05, 2016, 12:11:53 PM »
In addition, ethanol and water shrink when mixed. The question must ignore this.
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