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In electrolytic refining, the impure met...

In electrolytic refining, the impure metal is made

A

cathode

B

anode

C

both

D

none of the above

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The correct Answer is:
**Step-by-Step Solution:** 1. **Understanding Electrolytic Refining**: - Electrolytic refining is a method used to purify metals using electricity. It involves the use of an electrolyte solution and electrodes. 2. **Identifying the Components**: - In electrolytic refining, there are two electrodes: the anode and the cathode. - The anode is where oxidation occurs, and the cathode is where reduction takes place. 3. **Example of Copper Refining**: - A common example of electrolytic refining is the purification of copper. - In this process, the electrolyte used is typically a solution of acidified copper sulfate. 4. **Role of Anode and Cathode**: - The anode is made of impure copper, which means it contains various impurities mixed with copper. - The cathode is made of pure copper, which serves as the site for the deposition of pure copper ions. 5. **Process Explanation**: - When electricity is passed through the electrolyte, copper ions from the anode dissolve into the solution, while pure copper ions from the solution deposit onto the cathode. - As a result, the anode loses mass (due to oxidation) and the cathode gains mass (due to reduction). 6. **Conclusion**: - Therefore, in electrolytic refining, the impure metal is made of the anode, while the cathode is made of pure metal. **Final Answer**: In electrolytic refining, the impure metal is made of the anode. ---
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