The hydrolysis of ethyl acetate CH 3 COOC 2 H 5 + H 2 O ⇌ H + CH 3 COOH + C 2 H 5 OH in aqueous solution is first order w.r.t ethyl acetate. Upon varying the pH of the solution, the fi

Question

The hydrolysis of ethyl acetate CH 3 ​ COOC 2 ​ H 5 ​ + H 2 ​ O ⇌ H + ​ CH 3 ​ COOH + C 2 ​ H 5 ​ OH in aqueous solution is first order w.r.t ethyl acetate. Upon varying the pH of the solution, the first order rate constant varies as follows: pH: 3 2 1 k 1 ​ /1 0 − 4 (s⁻¹): 1.1 11 110 What is the order with respect to H⁺ and value of the rate constant?

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r a t e = k ′ [ E s t er ] [ H _ 3 O + ] x = k [ E s t er ] k = k ′ [ H 3 ​ O + ] x . ( 1 0 − 2 1 0 − 3 ​ ) x = 11 1.1 ​ ( 1 0 − 1 ) x = 1 0 − 1 ⟹ x = 1 k = 1.1 × 1 0 − 4 = k ′ ( 1 0 − 3 ) k ′ = 1.1 × 1 0 − 1 d m 3 m o l − 1 s − 1

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