Esters

Question 1

What is an ester

Answer 1

-An Alcohol reacting with a carboxylic acid by esterification
-With concentrated H2SO4 and heat
-Reaction is at equilibrium

Question 2

Formula for forming esters

Answer 2

Carboxylic acid + Alcohol <=> Ester + Water

-Catalyst: conc H2SO4

Question 3

What are biodiesels

Answer 3

A mixture of methyl esters made from tri esters and 3 moles methanol

Question 4

Why are biodiesels useful

Answer 4

They converse (reverse) crude oil supplies
-They reduce the amount of CO2 released in the atmosphere

Question 5

Define Hydrolysis

Answer 5

Breaking a covalent bond with water

Question 6

Give the reagants and condition for the production of soap

Answer 6

Triesters (veg oil) + NaOH (aq)—-> Soap (COONa salt) + alcohol
Reflux

Question 7

Give the reagents and conditions for the production of biodiesel

Answer 7

COONa + CH3OH——-> Biodiesel +3NaOH

NaOH (reflux) and methanol

Question 8

Industrial uses of acid anhydrides over acyl chloride

Answer 8

-Cheaper
-Less corrosive
-Don’t react with water
-Less violent/exothermic