Question

The conductivity of centimolar solution of KCI at 25°C is 0.0210 ohm^-1cm^-1 and the resistance of the cell containing the solution at 25°C is 60 ohm. The value of the cell constant is :

• A. 3.28 cm^-1
• B. 1.26 cm^-1
• C. 3.34 cm^-1
• D. 1.34 cm^-1

Answer 1

The Correct Option is B

To determine the cell constant, we use the formula:

\(\text{Cell constant} = \text{Conductivity} \times \text{Resistance}\)

We are given:

• Conductivity = 0.0210 ohm^-1cm^-1
• Resistance = 60 ohms

Substitute the given values into the formula:

\(\text{Cell constant} = 0.0210 \, \text{ohm}^{-1}\text{cm}^{-1} \times 60 \, \text{ohms}\)

Calculate the cell constant:

\(\text{Cell constant} = 0.0210 \times 60 = 1.26 \, \text{cm}^{-1}\)

Thus, the value of the cell constant is 1.26 cm^-1.

This matches with the given correct answer option, which confirms our calculation.