Influence of a change in concentration on the chemical equilibrium

LC3.5.2.2
Influence of a change in concentration on the chemical equilibrium
Influence of a change in concentration on the chemical equilibrium

Description

The position of the chemical equilibrium of a reaction can be influenced in accordance with Le Chatelier's principle. For example, one possibility is to alter the change in concentration of the reactants involved. In this experiment, students make a hexaaqua copper complex, convert it to a dichlorocopper complex by adding chloride ions, and then shift the equilibrium between the two complexes by adding water again and adding chloride ions again. Using the different colourations of the two copper complexes, students can easily observe the shift in equilibrium.

Components of equipment sets

1 667057  4 
Test tube rack metal, 20 mm Ø LD
1 6045682  4 
Powder spatula, steel, 185 mm LD
1 6659541  8 
Dropper bulb LD
1 6659531  4 
Dropping pipette 150 mm x 7 mm Ø LD
1 6640421  4 
Test tube Fiolax 16 mm x 160 mm LD
1 602022  4 
Beaker Boro 3.3, 100 ml, squat LD
1 610010  8 
Laboratory safety goggles LD
1 6729100  4 
Copper(II) chloride, 50 g LD
GHS07GHS09 Warning H302 H315 H319 H410
1 6735700  4 
Sodium chloride, 250 g LD
1 6753410  4 
Water, pure, 5 l LD
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