Question

The resistance of a conductivity cell with cell constant 1.14 cm⁻¹, containing 0.001 M KCl at 298 K is 1500 Ω. The molar conductivity of 0.001 MKCl solution at 298 K in S cm² mol⁻¹ is ______. (Integer answer)

Options

• 86

• 860

• 920

• 760

Answer 1

The resistance of a conductivity cell with cell constant 1.14 cm⁻¹, containing 0.001 M KCl at 298 K is 1500 Ω. The molar conductivity of 0.001 MKCl solution at 298 K in S cm² mol⁻¹ is 760.

Explanation:

`K = 1/R xx l/A`

`((1/1500) xx 1.14) S  cm^-1`

`=>` ∧_m = `1000 xx ((1.14/1500))/(0.001)` S cm² mol⁻¹

= 760 S cm² mol⁻¹

⇒ 760