OCRa A level Module 6 Carboxylic Acids & Esters Notes

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- .

23

. 6 1 3
Mod . . .



Carboxylic Acids



Comparing Melting +
Boiling Points :

carboxylic acids can form I bonds permanent -d forces between
-

+



molecules

Alkanes form H bonds between molecules
-




It bonds London forces
-


are stronger than

Carboxylic Kids higher melting point
-



have a




vs .
Alconols -
C .




AYmelting point -


has Hands + Permanent -d forces
~
alconos only have it bonds.




carboxylic acids are soluble in water-formsA bonds +
d-dforces with other

water molecules.




Acid Reactions


Reacts with Metals : Na


= =
D
7 .


(Hy -c +
Na -
CHz-C + Ht
10 -
H 20 - Nat

+
CH3 (80 H + Na -
CHz(08-Nat + H
-




2 .
2
CHy-co -

H
+
My
--
(CH3(88) , My +
He


[Mg]* [CHs(8s]
-




2 CHy(80H +
My --

, Reacts with Bases : NaOH

J

CH3-CE-Nat
=
+
NaOH >
CH3 C + He
- -




-
0 -
I




Reacts With Metal Oxides :
Nazo


11 &
0

<(CHy-c
= D =
2 >
CHe-c Nano
-

+ +
H-8
0 -

H 10 -- Nat



Reactions with Carbonates (Tests for Carboxylic acids) :
Ca(b>


2
ICha-c ) -
-
Cacon >
-




(Chy-cEo]a]" +
Ho


fizzing
+ solid dissolves

if gas passed though
lime water ,
turns milky