In SHE, the pH of the acid solution

Options

A. 7
B. 14
C. 0
D. 4

Answer

To determine the pH of the acidic solution in the Standard Hydrogen Electrode (SHE), we can follow these steps:

### Step-by-Step Solution:

1. **Understanding the Standard Hydrogen Electrode (SHE)**:
- The SHE is a reference electrode used in electrochemistry to measure the standard reduction potential (SRP) of other electrodes.
- It consists of a platinum electrode in contact with a 1 M solution of hydrogen ions (H⁺) and hydrogen gas (H₂) at a pressure of 1 bar.

2. **Identifying the Concentration of H⁺ Ions**:
- In the SHE, the concentration of hydrogen ions (H⁺) is given as 1 M (1 molar).

3. **Using the pH Formula**:
- The pH of a solution is calculated using the formula:
\[ \text{pH} = -\log[\text{H}^+] \]
- Here, [H⁺] is the concentration of hydrogen ions in moles per liter.

4. **Substituting the Concentration into the pH Formula**:
- Since the concentration of H⁺ is 1 M, we substitute this value into the pH formula:
\[ \text{pH} = -\log(1) \]

5. **Calculating the pH**:
- The logarithm of 1 is 0:
\[ \text{pH} = -0 = 0 \]

6. **Conclusion**:
- Therefore, the pH of the acidic solution in the Standard Hydrogen Electrode is **0**.