Question

41. If the pK, of acetic acid and PK 6 of dimethylamine are 4.76 and 3.26 respectively, the pH of dimethyl ammonium acetate solution is [22 April 2018, Shift-1] (a) 7.75 (b) 6.75 (c) 7.0 (d) 8.5 CY​

Answer 1

Answer:

(a) 7.75

Explanation:

pH = 7+ 12 [p K a - p K b]

pH = 7+12 [pKa - pKg]

here,

p K a = 4.76, p K b = 3.26

pKa = 4.76 , pKb = 3.26

= 7+12 [4.76 - 3.26]

= 7+12 [4.76 - 3.26]

7 + 12[1.50]

7+12[1.5]

=7+ 0.75 = 7.75

=7+ 0.75 = 7.75

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