Esters

Question 1

what are esters formed from

Answer 1

Alcohol and a Carboxylic acid

Question 2

what are esters functional group

Answer 2

• COO -

Question 3

methanol + propanoic acid —>

Answer 3

Methyl propanoate + water

Question 4

step by process of how to make esters between alcohols and carboxylic acids

Answer 4

1. add few drops of concentrated sulfuric acids to a boiling tube using a dropping pipette
2. Add about 10 drops of **ethanoic acid*
   3 Add equal volume of ethanol
3. Place boiling tube in a beaker of water and place on a tripod
4. Heat using a Bunsen Burner until water starts to boil, then turn off
5. After 1 minute, remove the tuband allow it to cool
6. once cool, pout mixture into a test tube of sodium carbonate solution + mix
   - a layer of the estershould form on top

Question 5

what smells do esters often have and what are their properties

Answer 5

• Pleasant smells - sweet and fruity
• Volatile - evaporates into gases easily

Question 6

why are esters used in perfumes

Answer 6

• due to sweet smell and volatile properties
• evaporates molecules can be detected by smell receptors in your nose

Question 7

what other use do esters have

Answer 7

Food flavouring - esters that taste/smell like rum, apple, orange, banana, grapes, pineapples ect.