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In a galvanic cell, the salt bridge (i...

In a galvanic cell, the salt bridge
(i) does not participate chemically in the cell reaction
(ii) stops the diffusion of ions from one electrolytes to another
(ii) is necessary for the occurrence of the cell reaction
(iv) ensures mixing of the two elecrolytic solutions

A

(i) and (iii) only

B

(i) and (ii) only

C

(iii) and (iv) only

D

all of these.

Text Solution

AI Generated Solution

The correct Answer is:
To solve the question regarding the role of a salt bridge in a galvanic cell, let's analyze each statement provided in the question step by step. ### Step 1: Understanding the Function of a Salt Bridge A salt bridge is a crucial component of a galvanic cell. It serves to maintain electrical neutrality by allowing the movement of ions between the two half-cells. ### Step 2: Evaluating Each Statement Now, let’s evaluate each statement given in the question: 1. **(i) The salt bridge does not participate chemically in the cell reaction.** - **Analysis**: This statement is true. The salt bridge does not undergo any chemical change during the cell reaction; it merely allows the flow of ions to maintain charge balance. 2. **(ii) The salt bridge stops the diffusion of ions from one electrolyte to another.** - **Analysis**: This statement is also true. The salt bridge prevents the direct mixing of the two electrolyte solutions, which could lead to unwanted reactions. 3. **(iii) The salt bridge is necessary for the occurrence of the cell reaction.** - **Analysis**: This statement is partially true. While a salt bridge is commonly used to facilitate the cell reaction by maintaining charge balance, there are some galvanic cells that can operate without a traditional salt bridge (using porous membranes instead). Therefore, this statement is not universally true. 4. **(iv) The salt bridge ensures mixing of the two electrolytic solutions.** - **Analysis**: This statement is false. The primary function of the salt bridge is to prevent the mixing of the two solutions, allowing ions to move without the solutions themselves mixing. ### Conclusion Based on the analysis: - The correct statements are (i) and (ii). - The incorrect statements are (iii) and (iv). ### Final Answer The correct options regarding the role of the salt bridge in a galvanic cell are: - (i) does not participate chemically in the cell reaction. - (ii) stops the diffusion of ions from one electrolyte to another.
To solve the question regarding the role of a salt bridge in a galvanic cell, let's analyze each statement provided in the question step by step. ### Step 1: Understanding the Function of a Salt Bridge A salt bridge is a crucial component of a galvanic cell. It serves to maintain electrical neutrality by allowing the movement of ions between the two half-cells. ### Step 2: Evaluating Each Statement Now, let’s evaluate each statement given in the question: ...
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