00:01
This statement sounds like it's true, but there is one aspect of it that makes it false.
00:08
Most heavy metal cations, when they form hydroxides or carbonates, are insoluble.
00:15
According to solubility rules, carbonates and hydroxides are mostly insoluble.
00:25
But we can make them more soluble if we have some metal bonded to, say, a couple hydroxides or metal bonded to a carbonate.
00:43
We can make it more soluble if we are to make the solution acidic.
00:52
As each of these slightly dissociate, they produce the metal and hydroxide, or they produce the metal and carbonate and both of these are basic.
01:14
So if we were to add an acid, the acid would react with the hydroxide allowing more of the solid to dissolve...