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Summary Volumetric Analysis - AS Revision and A2 Notes $7.30
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Summary Volumetric Analysis - AS Revision and A2 Notes

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Diagrams and key notes describing volumetric titration. Useful for A2.2 exam and practical examination.

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  • July 1, 2024
  • 6
  • 2022/2023
  • Summary
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Titration Revision AS

·
A titration is a method of volumetric analysis.
when indicator

Reliability
colour changes

Safety Accuracy
·
Use of a
pipette
·
Add solf dropwise ·


Repeat titration 2
filler near end point or 3 times
Read burette at Concordant
readings
·




bottom of (within 0 1cm2
.




meniscus .




Apparatus and practical techniques

Preparing a burette :
E -




· E the
water
burette
reading
meniscus




you'll be
filling it with /




E
the jet tap
pr
,




·
Discard solution n.
o-


·
Fill with solution
using
are
you
&




jet



Preparing a
pipette :
-
lineindicatinote
·
Use a filler
pipette -




·
Rinse pipette with deionised
water then discard water .
I
·
Rinse pipette with solution you
will be it with
filling
·
Discard this solution .




Using a
pipette :




hopethe solution
· Yom of meniscus it in

, Diluting a solution : line
indicating
exact
·
Pipette
solution into
volumetric flask
25cm3 of
a

.
original
clean
volume
&
·
Add deionised water to the
flask until the water is
just
below the line
.


Using disposable pipette add
·
a

deionised water
very slowly
until the bottom of meniscus is

-
on the line
.
·


Stopper the flask and invert
to mix
thoroughly .




See Clashcards for solution from of solid/volume
preparing a a mass

of a
liquid
.
Remember Idm" = I litre

-
Carrying out a titration :




First titration should be and overshoot
(by than 1(m3)
rough an no more

Next titrations should be concordant (within 0 1cm2) .

of each other .




Standard solutions are used.
S
↑ solution for which the concentration is accurately known .




Indicators :




Phenolphthalein Methyl
-
orange
In acid = colourless In acid = red
In alkali In
=
pink alkali-yellow
Used for Used for
If alkali is
strong bases
strong acids
If alkali is in the burette
in the burette : :


Colourless -
> Pink Red >
-
Yellow
If acid is in the burette : If acid is in the burette :
Pink >
-
colourless Yellow -
> Red




END OF AS REVISION

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