Question

In the construction of a salt bridge, saturated solution of KNO₃ is used because:

• A. KNO₃ is highly soluble in water
• B. Velocity of K⁺ and NO₃^- are same
• C. Velocity of K⁺ is greater than that of NO₃^-
• D. Velocity of NO₃^- is greater than that of K⁺

Answer 1

The correct option is B

Velocity of K⁺ and NO₃^- are same

In the construction of a salt bridge, saturated solution of KNO₃ is used because the cation as well as the anion of the electrolyte should have same ionic mobility and the same transport number.