How can you tell if something will produce a basic solution?
there are two typical ways to turn a solution basic, by direct addition of a hydroxide salt or by addition of a salt, made from the conjugate base of a weak acid, that will take up H+ from the solution: NaOH completely dissociates to add OH- directly; Na2CO3 completely dissociates, adding CO3(2-), which reacts with and removes H+ to make HCO3-.