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Chemistry Forums for Students => Undergraduate General Chemistry Forum => Topic started by: Jebz on August 01, 2012, 12:31:54 AM

Title: % / Volume of ethanol
Post by: Jebz on August 01, 2012, 12:31:54 AM

Using the density of ethanol at 24 degrees Celsius how would I find the %/volume? I can find lots of places that have 20 or 25 degrees but haven't found a place that refers to 24 degrees Celsius?

Title: Re: % / Volume of ethanol
Post by: AWK on August 01, 2012, 01:11:11 AM

http://en.wikipedia.org/wiki/Ethanol_(data_page)

Title: Re: % / Volume of ethanol
Post by: Hunter2 on August 01, 2012, 08:22:26 AM

One bracket is not highlighted, so the link is not working

Here the correct one:

http://en.wikipedia.org/wiki/Ethanol_%28data_page%29

Title: Re: % / Volume of ethanol
Post by: Jebz on August 01, 2012, 08:42:06 PM

that page doesn't give me what I need.

I have the density of my solution which is a ethanol/water mixture. I need to figure out the %/water there is.

Basically I either need a chart like http://www.separationprocesses.com/CourseWare/Experiments/Property01.htm
But that has 24 degrees or I need to figure out how to calculate moving from 25 degrees or 20 to 24 degrees. But I don't know how to do that.

Title: Re: % / Volume of ethanol
Post by: AWK on August 02, 2012, 03:39:52 AM

This page allow you to do calculations. You know density of unknown percentage alcohol solution at 24 C. For calculations you need densities of pure alcohol and water (also can be find on wikipedia) at this temperature.