Question

All compounds that contain a nitrate ion (NO3-) or acetate ion (C2H3O2-) are soluble.

This is a rule for solubility. Why aren't they soluable. what does charge density for acetate ion have to do with it?

Answer 1

Here is an article I found on the Internet that addresses your question.
http://www.pubmedcentral.nih.gov/articlerender.fcgi?artid=1184297
By the way, not the correct spelling of soluble.