Question

Q(27) The pH of a 0.050 M aqueous solution of ammonium chloride falls within what range? A) 0-2 B) 2-7 C)7-9 D) 9-12 E) 12-14 Q(28) Based on the information in the table below: which acid in aqueous solution is the weakest? Name Formula Ka Acetic Acid CH3COOH 1.8X10-5 Benzoic Acid C6H5COOH 6.3 X10-5 Formic Acid HCOOH 1.7 X 104 Hydrofluoric Acid HF 7.1 X 104 A) CH3COOH B) C6H5COOH C) HCOOH D) HF Q(29) K = 2.39 for the gaseous reaction SO2Cl2 + SO2 + Cl2. For a mixture where Q = 5.21 to reach equilibrium, the concentration of SO2Cl2 must A) Increase B) Decrease C) Depends on the amount added D) It cannot be determined Q(30) Which statement is correct? A) If Q<K then products must be converted to reactants. B) If Q>k then reactants must be converted to products. C) If Q=K then the system is at equilibrium. D) If Q<K then more reactants are produced. E) None of the answers is correct. Q(31) A Brønsted-Lowry base is? A) A proton donor. B) A proton acceptor. C) An electron pair donor, D) An electron pair acceptor. E) An anphoteric species. Q(32) A Lewis base is? A) A proton donor. B) A proton acceptor. C) An electron pair donor. ARNAR UMA TEOT DIE OOTORER 20TH 40 MASCANITRON

Answer 1

aka- [[A20472 (27 Kb for Nat2 = 148*40*5 = ka= key on the 2016-7* = 5569010 10 Hydrolyses of Nagel Nated th2o - Agot & NAZ We know that I Nag]= [2 of] and [NAGE] = 80050 ka = Tomory ove [1830r] =NO050 X 5156210–70 = 527x10-6 - p1= -log[1208] = -log(5.27X1000) = 5527 (B) RD Correet 27 28) aercity a ka. - Lower ka = Lower aetlity B Solar coolfka = 603 * @ elzcoort ( Ka = 15$ 810-4) is weakest (29) When 9 >k reaction stuffs to left. concentration of so zelz must (A) enereare When Q<k reaction Shiffs to ne product andle O 6 Ps correct (31) ® A proton aeceptor (32) An electron paio donor ©