Question

Is silver carbonate soluble?

Answer 1

No.

Explanation:

Silver carbonate, `"Ag"_2"CO"_3`, is considered insoluble in water because you can only dissolve a very, very small amount of this salt in `"1 L"` of water at room temperature.

According to Wikipedia, silver carbonate has a solubility of `"0.032 g L"^(-1)` at `25^@"C"`.

https://en.wikipedia.org/wiki/Silver_carbonate

This means that at `25^@"C"`, you can only hope to dissolve `"0.032 g"` of silver carbonate in `"1 L"` of water. In other words, at `25^@"C"`, a saturated solution of silver carbonate will contain `"0.032 g"` of dissolved salt for every `"1 L"` of water.

As a general rule, carbonates are only soluble if they contain alkali metal cations, i.e. cations of group 1 metal, or the ammonium cation, `"NH"_4^(+)`.