Question

In a reaction, 5 g ethyl acetate is hydrolyzed per litre in the presence of dil. HCl in 300 min.If the reaction is of the first order and the initial concentration of ethyl acetate is 22 g $L^{-1}$, the rate constant of the reaction is:

• A. $k=8.6\times {10}^{-4}mi{n}^{-1}$
• B. $k=1.4\times {10}^{-4}mi{n}^{-1}$
• C. $k=6.9\times {10}^{-4}mi{n}^{-1}$
• D. $Noneofthese$

Answer 1

The correct option is A $k=8.6\times {10}^{-4}mi{n}^{-1}$

a = 22 g $L^{-1}$
x = 5 g $L^{-1}$, t = 300 min
k = $\frac{2.3}{300min}log\frac{22g{L}^{-1}}{(22-5)g{L}^{-1}}=8.6\times {10}^{-4}mi{n}^{-1}$