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The effect of temperature on chemical equilibrium

The effect of temperature on chemical equilibrium

Change in the colour of the cobalt(II) chloride solution due to heating and cooling.

01:38

Chemistry

Keywords

balance, chemical equilibrum, concentration, cobalt chloride, water, hydrochloric acid, balance shift, komplex, chlorocomplex, complex formation, aquacomplex, aqua complex, chloro complex, colour change, anhydrous, water of crystallisation, heating, solution, evaporating dish, Bunsen burner, compound, chemical process, experiment, chemical reaction, general chemistry, chemical, chemistry

On-screen labels

Ethanolic solution of CoCl₂, Hot water bath (80°C), Cold water bath (20°C), Water (room temperature), Add enough room temperature water to the blue solution so that its colour changes to purple-pink., Place the test tube in the hot water bath., Observe what happens to the solution., The colour of the solution changes to blue because high temperature shifts the equilibrium, favouring the decomposition of aqua complexes., Now place the test tube with the blue solution in the cold water bath., Observe how the colour of the solution changes again., The colour of the solution changes to pink again because the drop in temperature shifts the equilibrium, favouring the formation of aqua complexes.
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