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AP EAMCET202021 Sep 2020Morning ShiftChemistryIonic EquilibriumActual

Which acid among the following has the highest p K_a value?

Options

  1. AHCl
  2. BHF
  3. C( HI )
  4. D( HBr )

Correct answer

B. HF

Step-by-step solution

( HF ( p K_a=3.1 ) ) ( aligned HCl ( p K_a . & =-6.0) HBr ( p K_a . & =-9.0) HI ( p K_a . & =-9.5) . aligned ) Therefore, HF has highest ( p K_a ) value. Hence, the correct option is (b).

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