JEE Advanced | 2013Chemical Kinetics and Nuclear ChemistryHard

Question

The initial rate of hydrolysis of methyl acetate (1M) by a weak acid (HA, 1M) is 1/100th of that of a strong acid (HX, 1M), at 25oC. The Ka of HA is

Options

A.

1× 10-4

B.

1 × 10-5

C.

1 × 10-6

D.

1 × 10-3

Solution

Rate law for acid catalysed hydrolysis of ester is
rate = k [H+] [ester]

[H+]weak =0.01
HA ⇋ H+  + A-
C-x     x       x

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