Potentiometric titration of iron(II) ions

VC3.5.1.3
Potentiometric titration of iron(II) ions
Potentiometric titration of iron(II) ions Titration curve of iron(II) ions
Potentiometric titration of iron(II) ions

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Description

In experiment C3.5.1.3, a potentiometric titration is performed in order to measure the concentration of iron(II) ions. In the process, the iron(II) ions are oxidised with potassium permanganate.

The change in the potential of the solution during the titration corresponds here to the change in pH in an acid-base titration.

Components of equipment sets

1 524005W  4  Mobile-CASSY 2 WiFi LD
1 524220  4  CASSY Lab 2 LD
1 5240672  8  pH adapter S LD
1 667416  4  Single-rod redox probe BNC LD
1 ADANBL124E  4  Analytical balance 120 g; 0,0001g, with USB interface LD
1 607105  4  Magnetic stirrer mini LD
2 664103  4  Beaker, DURAN, 250 ml, squat LD
1 30042  8  Stand rod, 47 cm, 12 mm diam. LD
1 30002  8  Stand base, V-shaped, small LD
1 665997  4  Graduated pipette 10 ml LD
1 666003  4  Pipetting ball (Peleus ball) LD
1 665845  4  Burette, clear glass, 25 ml LD
1 665816  4  Burette filling funnel plastic, 35 mm Ø LD
1 666559  4  Burette clamp for 1 burette, roller clamp LD
2 666543  4  Double, crossed boss head, 0...16 mm LD
2 666551  4  Universal clamp 0...40 mm LD
1 6719100  4  Iron(II) sulfate-7-hydrate, 100 g LD
GHS07 Warning H302 H315 H319
1 6727000 Potassium permanganate, 100 g LD
GHS03GHS07GHS09 Danger H272 H302 H410
1 6747920  4  Sulfuric acid, diluted, approx. 2 N, 500 ml LD
GHS05 Warning H290 H315 H319
1 6744670  4  Buffer solution pH 7.00, 250 ml LD
1 6746900  4  * Hydrochloric acid, 1 mol/l, 500 ml LD
GHS05 Warning H290
1 6753500  4  * Hydrogen peroxide, 30 %, 250 ml LD
GHS05GHS07 Danger H302 H318
1 additionally required: PC with Windows 7 or higher with WIFI or USB connection

Articles marked with * are not essential, we do however recommend them to carry out the experiment.

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