Question

On adding solid potassium cyanide to water.

• A. pH will increase
• B. pH will decrease
• C. pH will not change
• D. Electrical conductance will not change

Answer 1

Answer: (A)

pH will increase

Answer 2

$CN^{-} + H_{2}O \rightarrow HCN + OH^{-}$

Because $OH^{-}$concentration is increased.