Influencing the equilibrium

VC4.2.1.1
Influencing the equilibrium
Influencing the equilibrium

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Description

Experiment C4.2.1.1 studies the chemical equilibrium of the reaction of thiocyanate with iron. The chemical equilibrium is a dynamic equilibrium in which the starting materials and final products are present alongside one another in the reaction mixture. Under equilibrium conditions, exactly so many parts react in one direction as back in the opposite direction. In so doing, the concentrations of the participants in the reaction remain constant and their quotient is expressed as the equilibrium constant K. By adding one of the substances involved, a new equilibrium is established.

For the reaction being investigated here

the equilibrium constant can be calculated as follows:

Components of equipment sets

2 664268  4  Flat-bottom flask, DURAN, 250 ml, wide neck LD
2 664249  4  Erlenmeyer flask, Boro 3.3, 100 ml, narrow neck LD
1 664131  4  Beaker Boro 3.3, 400 ml, squat LD
1 666850  4  Stirring magnet, 15 mm x 5 mm diam. LD
1 607105  8  Magnetic stirrer mini LD
1 666962  4  Spatula, double ended, 150 mm LD
1 666003 Pipetting ball (Peleus ball) LD
1 665996  4  Graduated pipette, 5 ml LD
1 665998  4  Graduated pipette 25 ml LD
1 665754 Measuring cylinder 100 ml, with plastic base LD
1 661243  4  Wash bottle PE 500 ml LD
1 6677977 Electronic Balance 440-3N, 200 g : 0.01 g LD
1 6718710  4  Iron(III) chloride-6-hydrate, 250 g LD
GHS05GHS07 Danger H302 H315 H318
1 6727400  4  Potassium thiocyanate, 100 g LD
GHS07 Warning H302 EUH032 H312 H332 H412

Experiment Instructions

PDF (Experiment description) PDF (Experiment description) C4.2.1.1 Influencing the equilibrium
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