Question

Standard solution of $KN{O}_3$ is used to make salt bridge because

• A. velocity of $K^{+}$ is greater than $N{O}_3^{-}$
• B. velocity of $N{O}_3^{-}$ is greater than $K^{+}$
• C. velocity of $K^{+}$ and $N{O}_3^{-}$ are same
• D. $KN{O}_3$ is highly soluble in water

Answer 1

Answer: (C)

In salt bridge, only those electrolytes are used cations and anions of which are of same ionic mobility. $KCl,$ $N{H}_{4}N{O}_3$ and $KN{O}_3$ due to same mobility of cation and anion are used in salt bridge.