# How do I predict the spontaneity of an ionic metathesis reaction? [closed]

How do I predict the spontaneity of a metathesis reaction?

Is it a matter of summing up the differences between their ions' standard reduction potentials?

Take the salt metathesis reaction between two dissolved electrolytes; sodium chloride and silver nitrate (highlighted here). While the HSAB theory exists, it has not been quantified yet (as far that I know of).

Based my current knowledge of Chemistry, I would expect something like this:

Let the symbol of each element represent its standard reduction potential. Then spontaneity would be given by the following:

$\ce{((-Na) - (-Ag)) + (Cl - NO3)}$

Where a positive value would imply that the reaction is spontaneous, and the magnitude the degree of spontaneity.

## closed as too broad by Vatsal Manot, Geoff Hutchison, hBy2Py, Todd Minehardt, ringoApr 7 '17 at 4:52

Please edit the question to limit it to a specific problem with enough detail to identify an adequate answer. Avoid asking multiple distinct questions at once. See the How to Ask page for help clarifying this question. If this question can be reworded to fit the rules in the help center, please edit the question.

• Your question is confusing - I have no idea why you're mixing simple precipitation with redox - there's no redox in there! – Mithoron May 9 '15 at 15:01
• @Mithoron: Read about salt metathesis reactions here. – Vatsal Manot May 9 '15 at 15:18
• I'm well aware how metathesis works and it's driven by precipitation or vaporisation or complexation – Mithoron May 9 '15 at 17:53