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Saturated solution of KNO3 is used to make 'salt bridge' because:

Option: 1

velocity of K+ is greater than that of NO-3


Option: 2

velocity of NO-3 is greather than of K+


Option: 3

velocity of both NO-3 and K+ are nearly same


Option: 4

KNO3 is highly soluble in water


Answers (1)

best_answer

As we have learnt,

Function of Salt Bridge and Condition -

It maintains electrical neutrality in two compartments by allowing movement of anions towards anodic compartment and cations towards cathodic compartment.

  • It is a glass tube having KCl, KNO3, ammonium nitrate in a gelatin gel or agar-agar past.
  • The gelatin gel allows ionic movement through it but prevents any kind of mixing.
  • In the case of KCl or ammonium nitrate, the ionic mobility of cation and anion are same.

-

The salt bridge possesses the electrolyte having nearly same ionic mobilities of its cation and anion.

Therefore, Option(3) is correct

Posted by

Rakesh

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