22. Complete and balance the following acid-base equations: (a) A aqueous solution of HClO4 is added to an aqueous solution of LiOH. (b) Aqueous H2SO4 reacts with aqueous NaOH. (c) Ba(OH)2 solid reacts with HF gas.

Answers are in the explanation

Explanation:

An acid-base equation in general is the reaction between an acid and a base that produce water and a salt. Thus:

a) HClO₄(aq) + LiOH(aq) → LiClO₄(aq) + H₂O(l)

   Acid     + Base → Salt      + Water

b) H₂SO₄(aq) + 2NaOH(aq) → Na₂SO₄(aq) + 2H₂O(l)

   Acid     + Base     →   Salt      + Water

c) 2HF(g) + Ba(OH)₂(s) → BaF₂ + 2H₂O

   Acid     + Base → Salt      + Water

I hope it helps!