Question

of these four which ones are weak base, strong base, weak acid, or strong acid? sodium acetate, 1M HCl, NaHCO3 and Na2CO3

Answer 1

1M HCl is strong acid because it gives H⁺ ions in aqueous solution

Na₂CO₃ will produce CO₃^-, which is a conjugate base of a weak acid (removal of two H⁺ from carbonic acid ), therefore it is a VERY Strong base

Sodium Acetate breaks up into --> Na⁺ and  CH3COO^-.
The CH₃COO^- (Acetate ion) is a conjugate base of a weak acid (Acetic acid) and is a fairly strong base

NaHCO₃ is conjugate base of (weak) carbonic acid with only one proton removed so it is a weak base