The products of electrolysis of concentrated common salt solution are

Options

A. `Na+CI_(2)`
B. `H_(2)+O_(2)`
C. `NaOH+H_(2)+CI_(2)`
D. `NaOH+CI_(2)+O_(2)`

Answer

To determine the products of the electrolysis of concentrated common salt solution (sodium chloride solution), we can follow these steps:

### Step-by-Step Solution:

1. **Identify the Components of the Solution**:
- The concentrated common salt solution primarily contains sodium chloride (NaCl) and water (H₂O).

2. **Dissociation of Sodium Chloride**:
- When sodium chloride is dissolved in water, it dissociates into sodium ions (Na⁺) and chloride ions (Cl⁻):
\[ \text{NaCl} \rightarrow \text{Na}^+ + \text{Cl}^- \]

3. **Dissociation of Water**:
- Water also dissociates into hydrogen ions (H⁺) and hydroxide ions (OH⁻):
\[ \text{H}_2\text{O} \rightarrow \text{H}^+ + \text{OH}^- \]

4. **Electrolysis Process**:
- During electrolysis, oxidation occurs at the anode and reduction occurs at the cathode.

5. **Reactions at the Anode**:
- At the anode, the oxidation of anions occurs. Between chloride ions (Cl⁻) and hydroxide ions (OH⁻), chloride ions have a lower discharge potential, thus they are discharged first:
\[ 2 \text{Cl}^- \rightarrow \text{Cl}_2 + 2 \text{e}^- \]
- This reaction produces chlorine gas (Cl₂).

6. **Reactions at the Cathode**:
- At the cathode, reduction occurs. Between sodium ions (Na⁺) and hydrogen ions (H⁺), hydrogen ions are discharged first due to their higher tendency to be reduced:
\[ 2 \text{H}^+ + 2 \text{e}^- \rightarrow \text{H}_2 \]
- This reaction produces hydrogen gas (H₂).

7. **Formation of Sodium Hydroxide**:
- After the electrolysis, the remaining ions in the solution are sodium ions (Na⁺) and hydroxide ions (OH⁻). These combine to form sodium hydroxide (NaOH):
\[ \text{Na}^+ + \text{OH}^- \rightarrow \text{NaOH} \]

8. **Final Products**:
- Therefore, the final products of the electrolysis of concentrated common salt solution are:
- Chlorine gas (Cl₂)
- Hydrogen gas (H₂)
- Sodium hydroxide (NaOH)

### Conclusion:
The products of the electrolysis of concentrated common salt solution are chlorine (Cl₂), hydrogen (H₂), and sodium hydroxide (NaOH).

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