00:01
To become more soluble in a basic solution, you need to have something associated with the solid that will react with hydroxide, allowing the solid to dissolve.
00:13
The first one is barium sulfate.
00:20
Sulfate, most anions are basic, so the sulfate won't react with the base, but the barium could.
00:27
But typically the cations of strong bases are not significantly acidic and a known strong base is barium hydroxide so because barium came from barium hydroxide this is such a weak acid barium that it won't significantly react with the base allowing more of this solid to dissolve however, the very next compound, oxalic acid, is an acid itself.
00:57
The whole compound is an acid.
01:00
Because of that, adding it to a basic solution will allow it to react with the hydroxide and in turn allow more of it to dissolve.
01:12
The next compound is a base itself.
01:16
I think they messed up.
01:17
They put feoh3 when they should have done outside of the parentheses the 3.
01:26
This whole compound, iron 3 oxide, is a base.
01:30
Adding more hydroxide is going to make this significantly less soluble rather than more soluble...