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May 29, 2015

Homework Help: Chemistry

Posted by Sofia on Tuesday, June 23, 2009 at 12:43pm.

How do you determine the percent composition by mass of a 100 g K2SO4 solution containing a 20-g solute. What is the mole percent composition of the solute, assuming that the solution consists of 100 g water and 20 g of K2S04?

For percent composition of K2S04, I got 44.9 % K, 18.4 % S, and 36.7 % O, but I'm not sure if that's right. I have no idea how to determine the mole percent composition, though. If anyone can help me with this problem, I'll truly appreciate it!

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