HARDMCQ SINGLEJEE Mains ChemistryPhysical ChemistryChemical kineticsAchiever Section
1 mL of ethyl acetate was added to a flask containing 20 mL of N/20 HCl maintained at 25 °C. 2 mL of the reaction mixture were withdrawn at different intervals and titrated with a standard alkali solution. The following results were obtained: Time (min) : Alkali used (mL) : 19.24 24.20 26.60 29.32 42.03 Find rate constant. (a) 0.00327min (b) 0.00345min (c) 0.00306min (d) 0.00333min
Answer
A
Explanation
In case the hydrolysis follows first order kinetics, then 0 0 10 10 1 0 t 10 10 1 0 t 10 A V V 2.303 2.303 k log log t A t V V When,t 75min,V 42.03,V 19.24,V 24.20 42.03 19.24 2.303 2.303 22.79 k log log 75 42.03 24.20 75 17.83 0.00327min t 119min,V 42.03,V 19.24,V 26.60 4 2.303 k log 119 10 1 2.03 19.24 2.303 22.79 log 42.03 26.60 119 15.43 0.00327min
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