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E-17
Part III. Effect of Temperature on Equilibrium Involving Cobalt(II) Complex Ions
1.
Write equation (11) for the equilibrium reaction involving the cobalt(II) complex ions.
Use your experimental observations to explain how this equilibrium for the cobalt(II) complex ions is
shifted as the temperature:
(a) decreases from room temperature to ~ 0
C.
(b) increases from room temperature to ~ 90
C.
2.
Is this reaction exothermic or endothermic? Explain, using your answers to the above questions.
3.
Rewrite equation (11) for the equilibrium reaction for the cobalt(II) complex ions, with heat as either a
reactant or as a product, so that Le Châtelier's Principle
will predict the observed effects of
temperature changes on the reaction equilibrium.
ASSESSMENT
Performance
(1.0 mark):
Observations Sheet
(1.0 mark):
Laboratory Quiz
(8.0 marks):
Deductions
(if any):
TOTAL
(10.0 marks)
