AP Chem solubility and precipitation

Question

Predict whether each of the following compounds is soluble or insoluble in water.

a. Magnesium phosphate

b. Silver nitrate

c. Iron (lll) hydroxide

d. NH4Br

e. Li2CO3

Answer 1

You need to have a list of solubility rules. I will only list the ones that are germane to the problem:

1) All !A and ammonium salts are soluble. (d,e)

2) All nitrate, acetate, and chlorate are soluble (b)

3) All hydroxides are insoluble except IA and heavy IIAs (c)

4) Phosphates are insoluble except IAs (a)