1.

When potassium cyanide reacts with water, will the resulting solution be acidic, alkaline or neutral? Justify your answer.

Answer»

KCN is a salt of a strong base and weak acid. It undergoes hydrolysis when dissolved in water to form weak acid HCN and strong base KOH.

HCN is a weak acid because it gives less H+ ions in the solution while KOH is strong electrolyte and remains completely dissociated. Therefore, the resulting solution contains more OH ions and it is therefore alkaline.



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