Question

59. Based on the information found in Table 16.2 with respect to K, which statement is true? Page 12 TABLE 16.2 Some Weak Acids in Water at 25°C Structural Conjugate Acid Formula Equilibrium Reaction K Hydrofluoric (HF) HF + HO HO + F 68 x 10-4 Nitrous HO-NO NO, HNO (M) + H200 H304) + NO:) 5 x 10+ CHNO) Benzo GH.0, HCH. + H.-H,0) + CH.063 X 10 CHCH,0) Acetic H-0----HC,H,O, HCH,000+ HODH,00) + CH,0) 18 109 CHCH.O.) Hypochlorus (HCI) -O-a CIO HCIA) + HOU) HOCO 30 x 10 Hydrocyani (HCN) -CBN CN HCN) H.OH,Olap) + CN 49 X 100 Phenol CHO HC.H.O(g) +H.00 H40%) + CHLO() CHCHO) Copyright 2006 Pearson Prentice Hall,Inc. A) The smaller the K, the weaker the acid--that is, the more dissociation that occurs. B) No trend is observed from the table. C) The larger the K, the stronger the acid that is, the more dissociation that occurs. D) The larger the K, the stronger the acid that is, the less dissociation that occurs. 60. Based on the information found in Table 16.5 with respect to K, and K, which statement is true? TABLE 16.5. Some Conjugate Acid-Base Pairs Acid Base К. ΗΝΟ, (Strong acid) NO, (Negligible basicity) HF 6.8 X 10 F 1.5 X 10-11 HC HOA 1.8 X 10- C,H,O, 5.6 X 10-10 H.COM 43 x 10 HCO, 23 x 10 NHA 56 X 10-10 NH 1.8 X 10-5 HCO, 5.6 X 10-11 00, 1.8 X 10 OH (Negligible acidity) 0 (Strong base) A) K/K-1 x 10 B) K+K-1 x 104 C) pkpk- 14.00 D) pK, + pk. - 14.00