Question

When ethyl acetate was hydrolysed in presence of $0.1 \,N$. $HCl $, the rate constant was found to be $5.40 \times 10^{-5} \,s ^{-1}$ But when $0.1 \,N\, H _{2} SO _{4}$ was used for the hydrolysis, the rate constant was found to be $6.20 \times 10^{-5} s ^{-1}$. From these values we can say that

• A. $H _{2} SO _{4}$ is stronger than $HCl$
• B. $H _{2} SO _{4}$ is weaker than $HCl$
• C. both the acids have equal strength
• D. the data is insufficient to compare the strengths of $HCl$ and $H _{2} SO _{4}$

Answer 1

Answer: (A)

For equinormal solutions of the two acids,

$\frac{\text { Strength of Acid }_{1}}{\text { Strength of } Acid _{2}}=\frac{k_{1}}{k_{2}}$