alcohols esters and carboxylic acids

Question 1

what is the functional group of alcohols

Answer 1

OH

Question 2

two ways to make ethanol

Answer 2

hydration of ethene
fermentation of glucose

Question 3

conditions needed for hydration of ethene

Answer 3

• 300 degrees
• 60-65 pressure
• phosphoric acid catalyst

Question 4

advantages of hydration of ethene

Answer 4

• runs continously, makes pure ethanol

Question 5

disadvantages of hydration of ethene

Answer 5

lots of energy, non-renewable

Question 6

conditions for fermentation of glucose

Answer 6

• yeast
• 30 degrees
• anaerobic respiration

Question 7

ways to oxidise ethanol

Answer 7

• combustion
• microbial oxidation
• chemical oxidation

Question 8

how does ethanol burn

Answer 8

complete combustion with a blue flame

Question 9

what is microbial oxidation of ethanol

Answer 9

organisms such as bacteria use oxygen in the air to oxidise ethanol

Question 10

what is chemical oxidation of ethanol

Answer 10

• heat ethanol with pottasium diachromate and sulfuric acid
• will turn from orange to green

Question 11

what is the colour change of ethanol reacting with pottasium diachromate

Answer 11

orange to green

Question 12

what does oxidised ethanol become

Answer 12

ethanoic acid

Question 13

what is the functional group of carboxylic acid

Answer 13

COOH

Question 14

what is vinegar

Answer 14

aqueous solution containing ethanoic acid

Question 15

what are esters

Answer 15

forms when carboxylic acid forms with an alcohol and loses an H2O

Question 16

uses of esters

Answer 16

food flavourings and perfumes

Question 17

method of making esters

Answer 17

• mix carboxylic acid and alcohol
• add sulfuric acid
• heat
• tip mixture into sodium carbonate

Question 18

what are biopolyesters

Answer 18

biodegradable polyesters