soIiIoquy
Badges: 19
Rep:
?
#1
Report Thread starter 5 years ago
#1
what are they? they are in perfumes and in oils and fats too? whats the difference?!
0
reply
Rubato
Badges: 14
Rep:
?
#2
Report 5 years ago
#2
(Original post by mariam687)
what are they? they are in perfumes and in oils and fats too? whats the difference?!
They are organic compounds with the functional group COO. You get them from reacting an alcohol and a carboxylic acid and yes, they are present in those things.
0
reply
berivan123
Badges: 2
Rep:
?
#3
Report 5 years ago
#3
Esters is a chemical substance made from carboxylic acid and alcohol it has a functional group of COOH
yes it can be found in perfumes and oils because they smell nice and in /oils and fats ?
0
reply
berivan123
Badges: 2
Rep:
?
#4
Report 5 years ago
#4
why are they found in fats and oils what properties do they have ?
0
reply
kb12345
Badges: 2
Rep:
?
#5
Report 5 years ago
#5
•Esters have pleasant smells – often sweet and fruity – so they are used as flavourings in sweets or as scents in perfumes
•Thousands of individual ester molecules join together to form long-chain molecules – polyesters – which can be woven as fibres to make fabrics and as plastics to make bottles
•Fats and oils are esters. They are made from alcohols and fatty acids – carboxylic acids that contain a long chain of carbon and hydrogen atoms.
glycerol + stearic acid (gives) glyceryl tristearate + water
(alcohol) (fatty acid) (big ester – fat)
•When this fat is boiled with an alkali, such as sodium hydroxide, the fat is broken down into glycerol and sodium stearate, a typical soap:
sodium hydroxide + glyceryl tristearate (gives) sodium stearate + glycerol
•Soaps are sodium or potassium salts of long carbon chain carboxylic acids.
0
reply
X

Quick Reply

Attached files
Write a reply...
Reply
new posts
Back
to top
Latest
My Feed

See more of what you like on
The Student Room

You can personalise what you see on TSR. Tell us a little about yourself to get started.

Personalise

If you haven't confirmed your firm and insurance choices yet, why is that?

I don't want to decide until I've received all my offers (58)
39.73%
I am waiting until the deadline in case anything in my life changes (24)
16.44%
I am waiting until the deadline in case something in the world changes (ie. pandemic-related) (6)
4.11%
I am waiting until I can see the unis in person (15)
10.27%
I still have more questions before I made my decision (16)
10.96%
No reason, just haven't entered it yet (13)
8.9%
Something else (let us know in the thread!) (14)
9.59%

Watched Threads

View All