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For the electro chemical cell Pt(s)|unde...

For the electro chemical cell `Pt(s)|underset(1 atm)(H_(2))(g)|H^(+)(1M)||Cu^(2+)(1M)|Cu(s)`, which one of the following statements are true ?

A

`H^(+)` ions are formed at anode and Cu is deposited at cathode.

B

`H_(2)` liberated at cathode and Cu is deposited at anode.

C

Oxidation occurs at cathode

D

Reduction occurs at anode

Text Solution

AI Generated Solution

The correct Answer is:
To solve the question regarding the electrochemical cell represented as `Pt(s)|H2(g, 1 atm)|H+(1M)||Cu2+(1M)|Cu(s)`, we need to analyze the reactions occurring at the anode and cathode, and determine which statements about the cell are true. ### Step-by-Step Solution: 1. **Identify the Components of the Cell**: - The cell consists of a platinum electrode (Pt) in contact with hydrogen gas (H2) at 1 atm and a solution of H+ ions at 1 M concentration on the left side (anode). - On the right side (cathode), there is a solution of Cu2+ ions at 1 M concentration in contact with solid copper (Cu). 2. **Determine the Anode and Cathode**: - The left side (Pt | H2 | H+) is the **anode** where oxidation occurs. - The right side (Cu2+ | Cu) is the **cathode** where reduction occurs. 3. **Write the Half-Reactions**: - **At the Anode**: The oxidation half-reaction involves hydrogen gas losing electrons to form hydrogen ions: \[ \text{H}_2(g) \rightarrow 2\text{H}^+(aq) + 2e^- \] - **At the Cathode**: The reduction half-reaction involves copper ions gaining electrons to form solid copper: \[ \text{Cu}^{2+}(aq) + 2e^- \rightarrow \text{Cu}(s) \] 4. **Analyze the Statements**: - **Statement A**: "H+ ions are formed at anode and copper is deposited at cathode." - This statement is **true** because H+ ions are indeed produced at the anode and copper is deposited at the cathode. - **Statement B**: "H2 liberated at cathode and copper is deposited at anode." - This statement is **false**. H2 is not liberated at the cathode; instead, it is oxidized at the anode. - **Statement C**: "Oxidation occurs at cathode." - This statement is **false**. Oxidation occurs at the anode, not the cathode. - **Statement D**: "Reduction occurs at anode." - This statement is **false**. Reduction occurs at the cathode, not the anode. 5. **Conclusion**: - The only true statement is **Statement A**: "H+ ions are formed at anode and copper is deposited at cathode." ### Final Answer: The correct statement is: **A. H+ ions are formed at anode and copper is deposited at cathode.**
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