Question

The electrolyte of a salt bridge should:

• A. form a $\sigma$ complex with the ions in a solution.
• B. not react with the ions in the solution
• C. form hydrogen bonds with the ions in solution.
• D. react endothermically with the ions in the solution

Answer 1

The correct option is B not react with the ions in the solution

Salt bridge is a U–shaped inverted tube that contains a gel (paste of agar-agar powder) permeated with an inert electrolyte.
The criteria for an electrolyte to be used in salt bridge are :
1. The electrolytes should consist of cations and anions having same mobility.
2. The electrolytic ions should not react with the ions in the solution.
3. The electrolyte should not get oxidised/reduced at electrodes.