Question

Why saturated solution of kno3 is used as salt bridge?

Answer 1

A saturated solution of is highly ionic in nature. Therefore, it provides potassium ions and nitrate ions. Both of these ions have nearly same ionic mobility as they help in maintaining neutrality to the salt bridge by providing nearly same number of anions and cations in the anodic and cathodic compartments.

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Answer 2

Answer:

KNO3, the velocities of potassium ion and nitrate ion are almost the same.

Explanation:

• The main function of the salt bridge is to maintain the neutrality of the system. Therefore, while neutralizing the system, it supplies negative ions for excess positive charges and positive ions for excess negative charges.
• For a good salt bridge, the velocities of the ions should be the same. If the velocities were not equal, the ions could not neutralize the charge on both halfcells equally.
• As a result, the opposite force is generated, limiting the flow of current. In the case of KNO3, the velocities of potassium ion and nitrate ion are almost the same.
• Therefore, it is used to make a salt bridge.