SECTION B (20 MARKS) 1. (a) Several acids are listed below with their respective equilibrium constants. 7.2 x 10-4 HF (a

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Section B 20 Marks 1 A Several Acids Are Listed Below With Their Respective Equilibrium Constants 7 2 X 10 4 Hf A 1 (42.81 KiB) Viewed 51 times

SECTION B (20 MARKS) 1. (a) Several acids are listed below with their respective equilibrium constants. 7.2 x 10-4 HF (aq) → H*(aq) + F(aq) HS (aq) → H*(aq) + S² (aq) 1.3 x 10-13 HOAC(aq) → H*(aq) + OAC (aq) = 1.8 x 10-5 (i) Which is the strongest acid? Which is the weakest? (ii) What is the conjugate base of the acid HF? (iii) Which acid has the weakest conjugate base? (iv) Which acid has the strongest conjugate base? (b) Fill in the correct values in the following table. [H+]/M (a) (b) (c) (d) (e) (f) (h) pH 1.00 10.50 7.35 5.25 1.3 × 10-5 5.6 × 10-10 6.7 x 10-8 2.5 x 10-2 POH Ka Ka Ka = [OH-]/M