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TitleExperiment 3
TagsChemistry Chemical Substances Titration Analytical Chemistry Mole (Unit)
File Size36.6 KB
Total Pages5
Document Text Contents
Page 1

Experiment 3



Topic : Volumetric analysis − Acid base and redox

Purpose : To determine the mass of sodium ethanedioate used to prepare a

solution containing sodium ethanedioate and hydrated ethanedioic acid



Materials : KA 1 is a solution containing hydrated ethanedioic acid,

H2C2O4.2H2O, and sodium ethanedioate

KA 2 is a solution containing 3.5 g potassium manganate(VII) per dm
3


KA 3 is a solution containing 1.7 g hydroxyl ions per dm
3


KA 4 is 1.0 mol dm
-3

sulphuric acid

Phenolphthalein as indicator



Apparatus : Two 25 cm3 pipettes and pipette fillers

Two 50 cm
3
burettes

Six titration flasks

Two retort stands and clamps

One 50 cm
3
measuring cylinder

Two white tiles

One wash bottle filled with distilled water

One thermometer 0 °C–100 °C (by 1.0 °C)



Procedure : (1) 25.0 cm
3
of KA 1 is pipetted into a titration flask.

(2) Two or three drops of phenolphthalein indicator is added and this

solution is titrated with KA3.

(3) The reading is recorded in the table below.

(4) The titration is repeated to achieve accurate results.





Results :



















Accurate
Titration Rough

1 2 3

Final reading/cm
3
16.30 16.30 16.40

Initial reading/cm
3
0.00 0.00 0.00

Volume of KA 3/cm
3
16.30 16.30 16.40

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Sample report

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