B) NaHS, Kb of HS18 10-7 C) NaOAc, Ka of HOAc= 1.8 x 10-5 0 KCN, Ka of HCN = 4.0 x 10-10 BNaC1O, Ka of HCIO -32 * 10-5 40) The acid-dissociation constants of sulfurous acid (H2S03) are Kal 1.7 x 10-2 and 40) Ka2 = 6.4 x 10-8 at 25 0 C. Calculate the pH of a 0.163 M aque us solution of sulfurous acid. E) 6.21 A) 4.53 B) 1.93 C 1.28 D) 1.86 41) Of the following acids, not a strong ac 41) A) HNO2 B) HNO3 12SO4 D TiCI E) HCIO4 UEFALSE. Write T' if the statement is true and 'F' if the statement is false. 42) 2),n acid containing the COOH group is called a carbo-oxy acid. ULTIPLE CHOICE. Choose the one alternative that best completes the statement or answers the question. 3)HZ is a weak acid. An aqueous solution of HZ is prepared by dissolving 0.020 mol of HZ in 43) sufficient water to yield 1.0 L of solution. The pH of the solution was 4.93 at 25.0 C. The Ka of HZ is A) 9.9 x 10-2 B) 6.9 x 10-9 C) 2.8 Ã 10-12 D) 14 x 10-10 E) 1.2 x 10-5 The pH of a 0.15 M aqueous solution of NaZ. (the sodium salt of HZ) is 10.7. What is the Ka for HZ?4 A) 6.0 x 10-9 B) 8.9 x 10-4 C) 1.6 x 10-6 D) 1.3 x 10-12 E) 3.3 x 10-8
