If p K b for the fluoride ion at 25 ° C is 10.83, the ionization constant of hydrofluoric acid in water at this temperature is

Question

If p K b for the fluoride ion at 25 ° C is 10.83, the ionization constant of hydrofluoric acid in water at this temperature is, 1.74 × 1 0 - 5, 3.52 × 1 0 - 3, 6.76 × 1 0 - 4, 5.38 × 1 0 - 2

MARKS App · Accepted Answer

p K b = 10.83 , log K b = − 10.83 − ( 11 − 0.17 ) On taking antilog K b = 1.479 × 1 0 - 11 K a . K b = K w or K a × 1.479 × 1 0 - 11 = 1.0 × 1 0 - 14 K a = 6.76 × 1 0 - 4

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