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Electrochemistry
Question
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What is a salt bridge? What is its significance?

Answer

Salt bridge. A salt bridge consists of a saturated solution of NH4NO3 or KCl mixed with gelatin or agar jelly filled in a glass tube bent according to the requirement of the experiment.
Significance:
(i) Salt bridge prevents mixing of two electrolytes.
(ii) Prevents junction potential.
(iii) Maintains electrical neutraility.

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