question 60 d. It is weakly basic. e. We cannot predict its acid-base properties
ID: 303678 • Letter: Q
Question
question 60 d. It is weakly basic. e. We cannot predict its acid-base properties without more infor ANS: E Determine the equilibrium constant for the following reaction, CH3COOH(a)+F(aq) CH COO (aq) +HF(aq) given Ka (CH:COOH) 1.8 x 105 and Ka (HF) 6.8 x 104 a. 1.2 x 108 b. 2.6 x 10-2 60. c. 7.0 x 104 d. 3.8 x 101 e. 8.2 x 10 ANS: B 61. Which of the following statements is not correct? a. a Lewis acid is a substance that can accept a pair of electro alewis hase is a suhstance that can donate a nair of electr
Explanation / Answer
K = [CH3COO-] [HF] / [CH3COOH] [F-]
Ka (HF) =[ H+] [F- ] / HF
Ka ( CH3COOH) = [CH3COO-][H+] / [CH3COOH]
Ka ( CH3COOH ) Ka ( HF ) = [CH3COO-] [ HF] / [ CH3COOH] [F-] = K ( equilibrium constant)
K = 1.8*10^-5 / 6.8*10^-4
K = 2.6*10^-2
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