A kinetic and mechanistic study of the alkaline hydrolysis of ethyl acetoacetate by acid-base potentiometry: Determination of the pKa of the ester

1990 ◽  
Vol 67 (1) ◽  
pp. 72 ◽  
Author(s):  
Rodrigo Paredes ◽  
Rogelio Ocampo
Keyword(s):  
Alkaline Hydrolysis ◽  
Ethyl Acetoacetate ◽  
Mechanistic Study ◽  
Acid Base ◽  
Hydrolysis Of

Determination of VC-13 Nemacide Residues on Crops

1964 ◽  
Vol 47 (2) ◽  
pp. 287-288
Author(s):  
John I Teasley
Keyword(s):  
Alkaline Hydrolysis ◽  
Collaborative Study ◽  
Potassium Ferricyanide ◽  
Hydrolysis Of

Abstract A collaborative study was made of a method for the determination of VC-13 Nemacide residues, based on the alkaline hydrolysis of the pesticide to produce 2,4-dichlorophenol, which is measured colorimetrically with 4-aminoantipyrine and potassium ferricyanide. Results indicate that cleanup technique is critical and not effective for some crops. Several changes in the method were recommended for the next study. Three of five collaborators obtained satisfactory recoveries at levels of 50—250 ppb.

scholarly journals Kinetic study of hydrolysis of ethyl acetate using caustic soda

2018 ◽  
Vol 7 (4) ◽  
pp. 1995 ◽  
Author(s):  
Mostafa Ghobashy ◽  
Mamdouh Gadallah ◽  
Tamer T.El-Idreesy ◽  
M. A.Sadek ◽  
Hany A.Elazab
Keyword(s):  
Caustic Soda ◽  
Ethyl Acetate ◽  
Flow Reactor ◽  
Design Method ◽  
Plug Flow ◽  
Tubular Reactor ◽  
Acid Base ◽  
Chemical Reaction Kinetics ◽  
Hydrolysis Of

We report here, the hydrolysis of ethyl acetate by using caustic soda which is followed by means of conductance measurements which is widely used in chemical industry. The main aim of this research is to study the parameters of production of ethyl acetate by chemical reaction kinetics using an anion ion-exchange acting as a catalyst and acid-base titrations. The reaction of ethyl acetate and sodium hydroxide (caustic-soda) is done in a plug-flow reactor (steady-state tubular reactor) under the effect of different parameters including temperature, concentration and flow-rate, which allows the determination of activation energy and rate constants, due to large number of experiments. Factorial design method is used for the calculations of the experiment. It was determined that the order of the reaction is a second-order reaction.  

scholarly journals Extractive Spectrophotometric Determination of Malathion in Environmental Samples Using Gention Violet

2005 ◽  
Vol 2 (3) ◽  
pp. 187-192 ◽  
Author(s):  
K. M. Reddy ◽  
K. Suvardhan ◽  
K. Suresh Kumar ◽  
D. Rekha ◽  
P. Chiranjeevi
Keyword(s):  
Spectrophotometric Method ◽  
Alkaline Hydrolysis ◽  
Environmental Samples ◽  
Sodium Ethoxide ◽  
Ion Pair ◽  
Soil Samples ◽  
Organic Layer ◽  
Cationic Dye ◽  
Hydrolysis Of

A new simple and selective spectrophotometric method is developed for the determination of malathion by using Gention violet is described. The method was based on the alkaline hydrolysis of malathion in presence of sodium ethoxide to form sodium dimethyl dithiophosphate (Na-DMDTP). The Na-DMDTP was formed as an ion-pair complex with cationic dye, gention violet. The ion-pair complex was extracted into chloroform. The color of the organic layer was measured at 587 nm. The method was applied to the determination of malathion residues in water, grain and soil samples

scholarly journals Determination of the Bond Ruptured in the Alkaline Hydrolysis of Vinyl Acetate.

1972 ◽  
Vol 26 ◽  
pp. 855-856 ◽  
Author(s):  
Erkki K. Euranto ◽  
Antero Alhoniemi ◽  
A. Kjekshus ◽  
A. F. Andresen ◽  
W. B. Pearson ◽  
...  
Keyword(s):  
Vinyl Acetate ◽  
Alkaline Hydrolysis ◽  
Hydrolysis Of

scholarly journals Modeling the Alkaline Hydrolysis of Diaryl Sulfate Diesters: A Mechanistic Study

2020 ◽  
Vol 85 (10) ◽  
pp. 6489-6497
Author(s):  
Klaudia Szeler ◽  
Nicholas H. Williams ◽  
Alvan C. Hengge ◽  
Shina C. L. Kamerlin
Keyword(s):  
Alkaline Hydrolysis ◽  
Mechanistic Study ◽  
Hydrolysis Of
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