What do you look at to determine the more soluble salt? For instance, sodium chloride is more soluble than silver chloride. Why is this so?
It would depend on just how much of the salt will dissolve completely in water or some other liquid.
see this link---
look at the solubility rules, and the earlier the rule the more soluble the salt Na is an alkali metal which makes it more soluble than silver chloride, btw silver chloride is soluble because it is a halogen which is a later solubility rule