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Ester Value

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by

Tiseer Al Shiekh

on 8 March 2015

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Transcript of Ester Value

The number of milligrams of potassium hydroxide required to saponify the fatty acid esters in one gram of a fat, wax, oil etc
An organic compound formed in the reaction between acid and an alcohol where water is released.
Their general formula is RCOOR
ACID ESTERS
ACID VALUE
The mass of potassium hydroxide in milligrams required to neutralize one gram of chemical substance.
SAPONIFICATION
The saponification value is the sum of acid value and ester value

E
s
t
e
r

V
a
l
u
e
Equal to the saponification value minus the acid value .
(The difference of saponification value & acid value )
The action of alkali on oil paint whereby the paint is softened causing a defect

Pr
es
en
te
d

B
y
:

Hasnaa Safwat Awad
Reham Atef Zaki
Dalia Ali Yousef
Marwa Mostafa
Tiseer Mohamed Awd


This test method is useful in determining the assay of solvents and thinners which are esters or solutions of esters of carboxylic acid.
The ester value is calculated as percent ester
in which a stands for the number of cc. of half-normal alcoholic potassa solution and s for the number of grams of oil of used.
If for 1,5 g. of bergamot oil employed 0,1 cc. of half-normal potassa has been used to neutralize the free acid, 6,0 cc. for saponification,
the reaction between alcohols and carboxylic acids to make esters.

ESTERIFICATION
Identification
Equals :
Full transcript