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The hydrolysis of ethyl ester of acetic acid (ethyl acetate) in queous solution is first-order reaction (catalyzed by H3O+

The hydrolysis of ethyl ester of acetic acid (ethyl acetate) in queous solution is first-order reaction (catalyzed by H3O+

General Chemistry - Standalone book (MindTap Course List)
General Chemistry - Standalone book (MindTap Course List)
11th Edition
ISBN:9781305580343
Author:Steven D. Gammon, Ebbing, Darrell Ebbing, Steven D., Darrell; Gammon, Darrell Ebbing; Steven D. Gammon, Darrell D.; Gammon, Ebbing; Steven D. Gammon; Darrell
Publisher:Steven D. Gammon, Ebbing, Darrell Ebbing, Steven D., Darrell; Gammon, Darrell Ebbing; Steven D. Gammon, Darrell D.; Gammon, Ebbing; Steven D. Gammon; Darrell
Chapter13: Rates Of Reaction
Section: Chapter Questions
Problem 13.22QP
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3.2 - The hydrolysis of ethyl ester of acetic acid (ethyl acetate) in an aqueous solution is first-order reaction (catalyzed by H3O+ ions). a) Write the equation for this reaction. It is a bimolecular reaction. Explain why it is not a second order reaction. Under what conditions should the hydrolysis of acetate Ethyl be a reaction of the second order? b) As the total acidity of the reaction mixture increases during the reaction, the process of hydrolysis can be monitored by titration with a measured sodium hydroxide solution. For solving the kinetic quation we use the relation (picture below) where VO is the volume of the measured NaOH solution required for the titration of H+ ions at time t = 0, Vt is the volume of NaOH solution corresponding to the titration at time t and Voo is the volume of the NaOH solution corresponding to the time t = co (after the reaction is completed) We put 200cm3 of HCl solution with a concentration of 1 mol dm-3 into the Erlenmeyer flask using measuring cylinder.A measuring cylinder is placed in a 250 cm3 Erlenmeyer flask,200 cm3 of HCI solution with a concentration of 1 mol dm-3 . The flask is immersed in the thermostat set to the selected temperature. After tempering the contents, it is added to the bank 10 cm3 of ethyl acetic acid (from the bottle on which its molarity is indicated M = 88.11 g mol-1 , weight 901 g and volume 1000 ml), the mixture is briefly shook and we immediately take 5 cm3 of the sample into cooled water with a dry pipette in the titration flask (and the Erlenmeyer flask is returned to the thermostat). It is necessary to have a titration flask with 50 cm3 of cooled distilled water ready at a temperature of 0 to 5 °C. Why is the titration sample prepared in this way (poured into cool water)? СОА CA V₂-V₁ Vo V-V
Transcribed Image Text:3.2 - The hydrolysis of ethyl ester of acetic acid (ethyl acetate) in an aqueous solution is first-order reaction (catalyzed by H3O+ ions). a) Write the equation for this reaction. It is a bimolecular reaction. Explain why it is not a second order reaction. Under what conditions should the hydrolysis of acetate Ethyl be a reaction of the second order? b) As the total acidity of the reaction mixture increases during the reaction, the process of hydrolysis can be monitored by titration with a measured sodium hydroxide solution. For solving the kinetic quation we use the relation (picture below) where VO is the volume of the measured NaOH solution required for the titration of H+ ions at time t = 0, Vt is the volume of NaOH solution corresponding to the titration at time t and Voo is the volume of the NaOH solution corresponding to the time t = co (after the reaction is completed) We put 200cm3 of HCl solution with a concentration of 1 mol dm-3 into the Erlenmeyer flask using measuring cylinder.A measuring cylinder is placed in a 250 cm3 Erlenmeyer flask,200 cm3 of HCI solution with a concentration of 1 mol dm-3 . The flask is immersed in the thermostat set to the selected temperature. After tempering the contents, it is added to the bank 10 cm3 of ethyl acetic acid (from the bottle on which its molarity is indicated M = 88.11 g mol-1 , weight 901 g and volume 1000 ml), the mixture is briefly shook and we immediately take 5 cm3 of the sample into cooled water with a dry pipette in the titration flask (and the Erlenmeyer flask is returned to the thermostat). It is necessary to have a titration flask with 50 cm3 of cooled distilled water ready at a temperature of 0 to 5 °C. Why is the titration sample prepared in this way (poured into cool water)? СОА CA V₂-V₁ Vo V-V
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