During the electrolysis of molten lead bromide , which of the following takes place ? Bromine is released at the cathode Lead is deposited at the anode Bromine ions gain electrons Lead is deposited at the cathode

Options

A. Bromine is released at the cathode
B. Lead is deposited at the anode
C. Bromine ions gain electrons
D. Lead is deposited at the cathode

Answer

To solve the question regarding the electrolysis of molten lead bromide (PbBr2), we will analyze the processes occurring at both the cathode and the anode during the electrolysis.

### Step-by-Step Solution:

1. **Understanding Electrolysis**: Electrolysis involves the breakdown of an ionic compound into its elements using electricity. In this case, we are dealing with molten lead bromide (PbBr2).

2. **Identify the Electrodes**: In electrolysis, there are two electrodes:
- **Cathode**: The negative electrode where reduction occurs (gain of electrons).
- **Anode**: The positive electrode where oxidation occurs (loss of electrons).

3. **Determine the Ions Present**: In molten lead bromide, the ions present are:
- Lead ions (Pb²⁺)
- Bromide ions (Br⁻)

4. **Reactions at the Cathode**:
- At the cathode, lead ions (Pb²⁺) will gain electrons (reduction) to form lead metal (Pb).
- Reaction:
\[ \text{Pb}^{2+} + 2e^- \rightarrow \text{Pb (s)} \]
- Therefore, lead is deposited at the cathode.

5. **Reactions at the Anode**:
- At the anode, bromide ions (Br⁻) will lose electrons (oxidation) to form bromine gas (Br₂).
- Reaction:
\[ 2\text{Br}^- \rightarrow \text{Br}_2 + 2e^- \]
- Thus, bromine is released at the anode.

6. **Conclusion**: From the analysis, we can conclude:
- Lead is deposited at the cathode.
- Bromine is released at the anode.

### Final Answer:
- **Lead is deposited at the cathode.**
- **Bromine is released at the anode.**