Which will not affect the degree of ionization

Options

A. Temperature
B. Concentration
C. Type of solvent
D. Current

Explanation

To determine which factor does not affect the degree of ionization (α) of a weak electrolyte, we can analyze the factors that do influence it:

1. **Temperature**: The degree of ionization generally increases with an increase in temperature. This is because higher temperatures provide more energy to the molecules, allowing more ions to dissociate.

2. **Dilution (Concentration)**: As the dilution of a weak electrolyte increases (or its concentration decreases), the degree of ionization increases. This is because a lower concentration allows the ions to dissociate more freely, making the weak electrolyte behave more like a strong electrolyte.

3. **Type of Solvent**: The solvent used can significantly affect the degree of ionization. Different solvents have different dielectric constants (ε), which influence how well ions can separate from each other. For example, water has a high dielectric constant (around 80), which facilitates ionization.

4. **Current**: The passage of electric current through a solution does not affect the degree of ionization of a weak electrolyte. The degree of ionization is a property of the electrolyte itself and is influenced by the factors mentioned above, but not by the current.

Based on this analysis, the factor that does not affect the degree of ionization is the **current**.

### Final Answer:
The factor that will not affect the degree of ionization is **current**.