The equivalent conductance of strong electrolyte:

Options

A. Increases on dilution slightly
B. Decreases on dilution
C. Does not change with dilution
D. Depends upon density of electrolytes itself

Answer

To determine the effect of dilution on the equivalent conductance of a strong electrolyte, we can follow these steps:

### Step-by-Step Solution:

1. **Understand Equivalent Conductance**:
Equivalent conductance (\( \Lambda_e \)) is defined as the conductance of all the ions produced by dissolving 1 gram equivalent of an electrolyte in a particular volume of solution.

2. **Formula for Equivalent Conductance**:
The formula for equivalent conductance is given by:
\[ \Lambda_e = \kappa \times V \]
where \( \kappa \) is the conductivity of the solution and \( V \) is the volume of the solution.

3. **Relate Volume to Concentration**:
We can express the volume \( V \) in terms of normality (N):
\[ N = \frac{\text{gram equivalents}}{\text{volume in liters}} \]
If we consider 1 gram equivalent, then:
\[ V = \frac{1 \text{ gram equivalent}}{N} = \frac{1000 \text{ mL}}{N} \]
Thus, substituting this back into the equation for equivalent conductance gives:
\[ \Lambda_e = \kappa \times \frac{1000}{C} \]
where \( C \) is the concentration in mol/L.

4. **Effect of Dilution**:
When we dilute a strong electrolyte, the concentration \( C \) decreases. Since \( \Lambda_e \) is inversely proportional to \( C \), as \( C \) decreases, \( \Lambda_e \) increases.

5. **Conclusion**:
Therefore, the equivalent conductance of a strong electrolyte increases upon dilution. Among the given options, the first option stating that it "increases on dilution slightly" is correct.

### Final Answer:
The equivalent conductance of a strong electrolyte increases on dilution.

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