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A2 Chemistry - Unit - Fats and Oils Summary

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Summarises the Fats and Oils topic for A2 Chemistry Unit 1. Good luck!

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Fats and Oils Hydrogenation
* mptoitat Nasiri more saturated /Pudu's)
Biodiesel
produced by transesterification
* polyunsaturated fantails → hardened to form A alternative fuel made from waste veg .
oil / oillrom seeds

neat mixed
solids fan before used as margarine used in any diesel engine ,
or


hfNffA| * hydrogen added across c- Cbond , until A it's ethyl /methyl enrol fatty acid
( neutral
correct consistency * green fuel + H engine emission
* fats : protect
,

organs
* non -



toxic / biodegradable
i. provides insulation +
energy
* they are esters triesreror glycerol + farm acids I of -
- + Hz → - i i -
-




* heatoilwl
,
excess alcohol
wlaq Nqotlcaraiuir
' '
1
c. acids
* animal 1-
Veg fan / oils = esters or long-chain
CH , -0
É R CHI -
OH
H
-
-




* bubble Hi gas IH
"


µ -
L -
on glycerol
through " ' it, - o.ci?p+3CHzOHN-5 -
OH

,

c -
oh / propane -1,2 ,
} trial
-
temp .
: about 150°C
dth.o.ci -

R
Ith -
Ot,
µ -




☒ llltalyst : finely divided
H
-

f -
OH
nickel powder
H


Saponification
Transesterification fall hydrolysed
fOrmatitnot farm acids



triglyceride
-



* process by which diff .

carboxylate RCOO ,
-
can be exchanged A infooa → rancid smell but controlled hudrolulit Useful

" between different triglycerides
H
I
g H -
,

c
-
o -
É -
" Hino -
Ctb
used to A Mpt of fat / Oil ☒ reflux fat w/ dilute alkali / e.g. KOHL →
potassium sand fatty acids
H -
C -
OH

ftp.E-ccthhb.CH
it
I " " " ' 6- ""
A temp : 120°C * these salts Used as hydrolysis process
f soaps
H 1-
o :
saponification
- -




1. µ
-




3
-




+ , →
µ ,
É
-




oil heated WI dilute NaOH glycerol
H
f A 1-
-




1 -
o - -

latino -
CH ,




-1%-111-1,1
H C OH '
f
- -


' "
3m01 long chain / fatty acid
f,
.




H C -

o -
CH}
1m01 ester 0110114 acid
,
-

,


1m01
-




Intermolecular : ,
glycerol t
É 1- É 31101-1
.




111-1216 t →
É
H -
° CH,
É
-
- -




Chio
-
R

✗É
-



(tho R pi
Cho
d
- - - -




211-101-1
H O 11th ) / o CH }


( is / Trans
tho
- - -




two
-




+

,

LHIO -
É -
R thro É- -
R
'
thro É - -
R,
H


* Unsarured fats can have cis-trans isomerism H

* trans faith risnotloronary
-
disease # Intramolecular : H -
d -
011

* ( is / 2= cannot pack close together d t 311-13111-121101004
liquid at room temp
É
: ou
CHIOH H
- -




no
.




c. Hip - -
r I
* transit linear : pack closely together M points
d. y f Potassium
'



:


{ µ ,µ
. .




→ µ -
-

c -
R h -
-


oh ☒
of contract for vdw 's lampt than cis isomer stearate
I,


{ µ ,µ, { µ , , ,, glycerol

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Uploaded on
September 8, 2025
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2021/2022
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