Question

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Answer 1

12th/Chemistry

Electrochemistry

Question :

The conductivity of 0.20M solution of KCl at 298K is 0.0248 S cm‾¹. Calculate its molar conductivity $.$

Answer :

★ The inverse of resistivity (ρ) is called conductivity or specific conductance (k)

• SI unit : S m‾¹

ATQ, k = 0.0248 S cm‾¹

∴ k = 0.000248 S m‾¹

★ Molar conductivity (λm) is the the conductance of a solution containing 1 mole of the electrolyte.

• λm = k × 1000/Molarity

⭆ λm = k × 1000/M

⭆ λm = 0.000248 × 1000/0.20

⭆ λm = 0.248/0.20

⭆ λm = 1.24 S m²/mol

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