What should be the characteristics of the electrolyte used in salt bridge?

Explanation

Characteristics of the electrolyte used in salt bridge are as follows:
i) The electrolyte in salt bridge should be inert and should not react chemically either with electrolyte of the anodic half cell or the electrolyte of the cathodic half cell.
ii) The cation as well as the anion of the electrolyte used should be of the same ionic mobility. The common electrolytes used in the salt bridge are KCl, `NH_(4)NO_(3) and KNO_(3)` etc.