Question

The following chemical reaction takes place in aqueous solution:

FeNO32(aq) + 2NaOH(aq) → FeOH2(s) + 2NaNO3 (aq)

Write the net ionic equation for this reaction.

Answer 1

we have below given equation

Fe(NO3)2 (aq) + 2 NaOH (aq) --> Fe(OH)2 (s) + 2 NaNO3 (aq)

Total ionic equation is

Spectator ions should not be removed here. Spectator ions are part of total ionic equation

Fe2+ (aq) + 2 NO3- (aq) + 2 Na+ (aq) + 2 OH- (aq) --> Fe(OH)2 (s) + 2 Na+ (aq) + 2 NO3- (aq)

Spectator ions should be removed now. Spectator ions are not part of total ionic equation

After removing Spectator ions, net ionic equation is:

Fe2+ (aq) + 2 OH- (aq) --> Fe(OH)2 (s)

Fe²⁺ (aq) + 2 OH^- (aq) --> Fe(OH)₂ (s)