Question

If the resistivity of 0.1 M KCI solution is 50 Ω cm, what is it's molar conductivity?

Options

• 160 Ω^-1 cm² mol^-1

• 240 Ω^-1 cm² mol^-1

• 290 Ω^-1 cm² mol^-1

• 200 Ω^-1 cm² mol^-1

Answer 1

200 Ω^-1 cm² mol^-1 

Explanation:

Conductivity (k) = `1/"Resistivity"`

k = `1/50` = 0.02

Molar Conductivity = `(100  "k")/"C" = (1000 xx 0.02)/0.1`

= 200 Ω^-1 cm² mol^-1