Practice 8: What is the Kã of a weak acid if a 0.100 M solution has a pH of 4.25? A. 3.2 x 10-8 B. 4.2 x 10-3 C. 6.7 x 10-6 D. 5.4 x 10-5

Calculate the pH of a 0.50 M aqueous solution of HF. (K₂ 7.2 x 10-4) A. 3.6 x 10-4 B. 0.019 C. 1.7 D. 3.4

What is the Kw of pure water at 15.0 C if the pH is 7.20? a. 6.31 x 10^8 b. 1.26 x 10^-14  c. 3.98 x 10^-15 d. 1.26 x 10^-7 e. 1.00 x 10^-14

Calculate the pH of a 0.345 mol L-1 solution of formic acid, Ka = 1.8 x 10-4. Select one: a. 3.17 b. 2.49 c. 2.10 d. 1.60 e. 2.04

The pH of 0.100 M Jackmanic Acid, HJa, is 2.24. What is the value of  Ka for the acid?   a. 5.4 × 10-3   b. 4.4 × 10-5   c. 3.5 × 10-4   d. 2.24

15. Dimethylamine (CH3)2NH is a weak base with a pKą of 11.0 Calculate the pH of a solution of dimethylamine at 0.40 mol.L-1. b. Calculate the pH of a solution of dimethylamine at 4.0 x 10-2 mol.L-¹.

Q6

Calculate the Kb of Hypochlorous acid, Ka= 3.5 x10^-8 A.1.3 x 10^-4 B.2.9 x 10^-7 C.3.1 x 10^-6 D. 8.6 x 10^-4

A 0.400 M monoprotic weak acid solution has a pH of 2.50. What is the p K a of this acid? a.4.60 b.5.57 c.4.43 d.1.93 e.9.57