Question

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

(A) 1 x 10^-4 

(B) 1 x 10^-5 

(C) 1 x 10^-6 

(D) 1 x 10^-3

Answer 1

(A) 1 x 10^-4 

Rate in weak acid = 1/100 (rate in strong acid)