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Zusammenfassung Fette chemisch betrachtet
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Fette chemisch betrachtet
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sophiecelayir
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Fee chemisch betrachtetFette sind unpolar also kaum bis garnicht in Wasser löslich
. Hi
,
I
I
.,
C- OH -
-
+ - -
-
-
H
-
Sie bestehen aus Glycerin und drei Fettsäuren .
1
Hi
44 / y
t I
.
-C-OH - -
I1
- + -
-
H
Hit
Glycerin :
CzHgOy
44 / y
I
. -4
-
+
- -
+
-
H
-
C-OH
I
-
I
H
-
1
ungesättigt oder gesättigte Fettsäure ?
Octar Octer
-H
H
I
I
! ÖGC I
CgH18 CgH16
gesättigte Fettsäure ungesättigte Fettsaure
-
> keine Doppelbindungen besitzt eine Doppelbindung
Nachweis von
Doppelbindungen :
Man kann CC
Doppelbindungen in Fettsäuren durch die lod bzw
. Bromprobe erkennen
.
y
Es wird Brom/od Wasser zu der zu testenden Lösung gegeben
. -
y
-
Test positiv
>e
-
höher die Bromzahl , desto ungesättigter ist die Lösung Test negativ
>
-
Bromwasser
↳ Bromwasser ist entfärbt
bleibt gleich
Bromzahl bestimmen :
geg 109
: Fett addieren 0 01 mol
. Bre
ges
:
1009
1009
Fett
Fett
addieren
addieren
x
S
0, 1
g
O
2
mol
Bra
Brz
( ·
10
lodzahl
M((z) =
2 .
berechnen
126 9
,
g/md
:
= 253 8 ,
glma
= 25 38
0, 1
glmol (1) ,
glmo
M(B) =
2 .
79 , 9
glmol = 159 , 8 glmol
Fett addieren
=>
1009 25 , 38 91
0 , 1 mol (Br) =
15 98
,
glmol
Die Lodzahl dieses Fettes ist 25 38 , .
=>
100g Fett addieren 15 . 98
g Brz
Die Bromzahl dieses Fettes ist 15 , 98 .
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