Hydrofluoric acid is a weak acid. At 2 5 ∘ C , the molar conductivity of 0.002 M HF is 176.2 Ω − 1 cm 2 mol − 1 . If its Λ m ∘ = 405.2 Ω − 1 cm 2 mol − 1 . Equilibrium constant at the given concentr

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Hydrofluoric acid is a weak acid. At 2 5 ∘ C , the molar conductivity of 0.002 M HF is 176.2 Ω − 1 cm 2 mol − 1 . If its Λ m ∘ ​ = 405.2 Ω − 1 cm 2 mol − 1 . Equilibrium constant at the given concentration is

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K ​ α = Λ m ∘ ​ Λ c ​ ​ = 405.2 Ω − 1 cm 2 mol − 1 176.2 Ω − 1 cm 2 mol − 1 ​ = 0.435 = [ HF ] [ H + ] [ F − 1 ] ​ = 1 − α C α 2 ​ = 1 − 0.435 ( 0.002 M ) ( 0.435 ) 2 ​ = 6.7 × 1 0 − 4 M = 6.70 × 1 0 − 4 M . ​

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