Question

Saturated solution of KNO3 with agar agar is used to make salt bridge because:-


a) Velocity of K+ and NO3 - ions are different
b) Ionic mobility of NO3 - is greater than that of K+
c) Ionic mobility of both K+ and NO3 - are nearly same
d) Size of K + is greater than that of NO3 -

Answer 1

Option 3rd is correct i.e Ionic mobility of K+ and NO3- are nearly same because they maintain the electrical neutrality of anodic and cathodic compartment and they help in completing the circuit.
I hope it will help u...

Answer 2

Answer: Option (3) is the correct answer.

Explanation:

A saturated solution of $KNO_{3}$ 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.

Thus, we can conclude that saturated solution of []tex[KNO_{3}[/tex] with agar agar is used to make salt bridge because ionic mobility of both $K^{+}$ and $NO^{3-}$ are nearly same.