Question

Which of the following compounds would result in an exchange reaction if mixed in an aqueous solution with (NH4)2S?

a. SrCl2
b. Li2C2O4
c. CH3CO2Ag
d. MnSO4

I don't know what to look for.
Look for the following:
1. formation of an insoluble substance (a precipitate). Do you know the solubility rules?
2. formation of a gas.
3. formation of a weak electrolyte.
4. possibility of an oxidation-reduction reaction.

Here are the solubility rules.
http://www.files.chem.vt.edu/RVGS/ACT/notes/solubility_rules.html

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