Illustrate Le Chatelier’s Principle by demonstrating the effects of temperature changes

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8 Terms

1
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Step 1

Mix together a solution of iron(III) chloride and one drop of potassium thiocyanate solution in a test-tube

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Observation of step 1

Red colour forms

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Why does a red colour form when iron(III) chloride and potassium thiocyanate solution are mixed?

Equilibrium lies to RHS of equation

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Draw a diagram of the first observation

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Step 2

Divide the solution among three test tubes. Place one test tube in hot water. One in ice. Last one at room temperature

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What is observed when the three test tubes are placed at different temperatures

Hot- Yellow. Ice-Red. Room Temp- Orange

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Explain the observation when the three test tubes are placed at different temperatures

Hot: equilibrium shifts to left (endothermic). Cold: equilibrium shifts to right (exothermic)

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Draw a diagram of the test tubes in three different temperature conditions