chemistry problem !!!!!!!

[Ahmed360]

during esterification what reagentas to we need (other than alcohol and carboxylic acid )?????

during hydrolysis ( reverse of esterification ) what reagents do we need ??????

 

[workinghard]

conc h2so4 warm for bout 5 min
or is it reflux... hmmm i cant rmbr
n same reagents 4 hydrolysis doh an alkali can b used 2!

 

[zeebujha]

The key here is to differentiate between the hydrolysis and the esterification reaction

For esterification:
Use conc. H2S04 and heat under reflux. Conc. H2SO4 acts as a catalyst and also pushes the equilibrium to the fight. You probably know that water is produced during the reaction. H2SO4 reacts with the water to give hydronium ions and this decreases the conc. of H2SO4, pushing the eq. to the right.

For hydrolysis:

Same reagents BUT different concentration.
Hydroslys requires water. If you use CONC.,there's no way you are going to get enough water molecules for the reaction!!! So, you need DILUTE H2SO4. And as always, heat under refulx is everpresent!!

 

[filza94]

FOR Chemistry PAPER 33!!!!!!!!!!

hydrated ammonim salt titrated with KMnO4
usual salt analysis
one thermal question

We have to titrate ammonium nitrate with KMn04 or would we need to oxidize potassium iodide in the

presence of ammonium nitrate and then titrate the resulting solution with sodium thiosulphate? :|

see question no.1 in june2008-31
a similar question is expected!