Which if the following compounds is insoluble in water

(NH4)2CO3
AgBr
CuSO4
KI
LiNO3

is it CuSO4 because sulfates are insolube

Use that solubility chart.

Here is rule 4 of the solubility rules I posted yesterday and today. Note that copper is not listed as an exception; therfore, CuSO4 is soluble.

All sulfates are soluble, except those of barium, strontium, calcium, lead, silver, and mercury (I). The latter three are slightly soluble.

Among the given compounds, CuSO4 is actually soluble in water. Sulfates, in general, are soluble except for a few exceptions.

The correct answer is AgBr (Silver Bromide). AgBr is insoluble in water.

To determine which compound is insoluble in water from the options provided, you can use the solubility rules. These rules provide general guidelines for the solubility of different compounds in water.

The solubility rules state that most sulfate compounds are soluble in water, except for a few exceptions. Therefore, CuSO4 (copper(II) sulfate) is actually soluble in water, rather than insoluble.

On the other hand, AgBr (silver bromide) is generally considered insoluble in water according to the solubility rules. Silver bromide is a compound containing a halogen (bromine), and halides often exhibit low solubility in water.

So, the correct answer is AgBr because it is insoluble in water.