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At what pH, the dissociation of hypoiodous acid takes place?

(a) 1

(b) 2

(c) 3

(d) 4

I had been asked this question in final exam.

My enquiry is from Iodine, Bromine and Ozone Treatment in chapter Properties of Disinfection of Environmental Engineering

1 Answer

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Correct answer is (d) 4

The explanation: The dissociation of hypoiodous acid takes place at pH = 4.

HIO <=> H^+ + IO^–.

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