If initial concentration of ethyl acetate is `0.50` M it is hydrolysed with dilute mineral acid in such a way that the reaction is almost `(90%)` complete at equilibriu The final concentration of water in the reaction mixture is

Options

A. `0.45` M
B. 45 M
C. `55.05` M
D. Cannot be determined

Answer

C

Explanation

Ethyl acetate `+ H_(2)O hArr underset("acid")("Acetic")+underset("alcohol")("Ethyl")`
`{:("Initial",0.50M,55.5M,-,-),("At eqn",0.05M,55.5 M,0.45M,0.45 M):}`
Amount of ethyl ahydrolysed at eqm
`= 90 %` of 0.50 M = 0.45 M
Amount of water used for hydrolysis
= Amount of ester hydrolysed
`=0.45 M`.