CBSE Class 12-science Answered

If you take NaOH, then the equivalent of OH- produced will be 1. So, number of moles of OH^- produced will be 1.

If you take Mg(OH)₂, then the equivalent of OH^- produced will be 2. So number of moles of OH^- produced will be 2.

Mg(OH)₂ (s) Mg²⁺ (aq) + 2 OH^- (aq)

1 molecule                  1 ion              2 ions

Multiplying by Avogadro's number,

1 x N_A                          1 x N_A           2 x N_A

1 mole                        1 mole           2 moles