Chemical Kinetics and Nuclear ChemistryHard

Question

The hydrolysis of an ester was carried out with 0.1 M H2SO4 and 0.1 M HCl separately. Which of the following expressions between the rate constants is expected ? The rate expression being rate = k[H+][ester]

Options

A.kHCl = kH2SO4
B.kHCl > kH2SO4
C.kHCl < kH2SO4
D.kH2SO4 = kHCl

Solution

[H2SO4] = 0.1 M = 0.1 × 2 = 0.2 N
[HCl] = 0.1 N
In case of H2SO4
r1 = k[H+] [Ester]
kH2SO4 =
In case of HCl
r2 = k[H+] [Ester]
kHCl =
Hence kHCl > kH2SO4

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