Question

major species present when dissolved in water for NaCN

Answer 1

Ans :- Major species are CN^- , HCN , OH^- and H₂O .

Explanation :-

NaCN is a salt of weak acid (HCN) and strong base (NaOH). therefore when NaCN dissolved in water it will give a weak acid i.e. HCN and strong base i.e. NaOH as :

NaCN (aq)........ +............ H₂O (l) <----> NaOH (aq).......... +.................. HCN (aq)

salt..........................................................strong base.............................weak acid

Ionic equation for this reaction is :

Na⁺(aq) + CN^- (aq) + H₂O (l) <----> Na⁺(aq) + OH^- (aq) + HCN (aq)

Net ionic equation after the cancellation of spectator ion i.e. Na⁺ on both side is:

CN^- (aq) + H₂O (l) <----> OH^-(aq) + HCN (aq)

Hence these are the major species presents when NaCN dissolved in water.