Homework Help: Science

Posted by Agnes on Friday, March 8, 2013 at 12:51am.

What volume of ethanol must be diluted with water to prepare 768 mL of 0.873 M solution? The density of ethanol is given as 0.789 g/mL.
Answer in units of mL

Science - drwls, Friday, March 8, 2013 at 7:03am
You will require 0.873*0.768 = 0.6705 moles of ethanol. Its molar mass is 46 g/mol, so that is 30.84 g. Divide by the density of ethanol to get the ethanol volume, in ml.

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