Question

Which of the following is an acid base reaction?

C(s) + O2(g) → CO2(g)
MgSO4(aq) + Ba(NO3)2(aq) → Mg(NO3)2(aq) + BaSO4(s)
2 HClO4(aq) + Ca(OH)2(aq) → 2 H2O(l) + Ca(ClO4)2(aq)
Fe(s) + 2 AgNO3(aq) → 2 Ag(s) + Fe(NO3)2(aq)
None of the above are acid base reactions.

Answer 1

2 HClO4(aq) + Ca(OH)2(aq) → 2 H2O(l) + Ca(ClO4)2(aq)

Answer 2

Doesn't that depend upon how you define an acid and a base?

Answer 3

2 HClO4(aq) + Ca(OH)2(aq) → 2 H2O(l) + Ca(ClO4)2(aq)