Question
What is a salt bridge? What is it used for?
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Answer
A salt bridge is a $U$ - shaped tube containing concentrated solution of an inert electrolyte like $KCl , KNO _3, K _2 SO _4$, etc., or a solidified solution of an electrolyte such as agar-agar and gelatine. It is used,
1. To complete the electrical circuit by allowing ions to flow from one solution to the other without mixing the two solutions.
2. To maintain the electrical neutrality of the solutions in the two half cells.
1. To complete the electrical circuit by allowing ions to flow from one solution to the other without mixing the two solutions.
2. To maintain the electrical neutrality of the solutions in the two half cells.
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