Question

8.53 Use Le Châtelier's principle to predict the direction of equi- librium shift and the changes that will be observed (color, amount of precipitate, etc.) in the following equilibria when the indicated stress is applied: a. heat +Co2 (aq) +4CI (aq)2 COCL (aq); colorless blue pink The equilibrium mixture is heated. b.heat+Co2 (aq) + 4CI (aq)e CoCL (aq); blue pink is added to the equilibrium mixture. colorless Co c. Fe3 (aq) + 6SCN (aq) Fe(SCN),(aq); red brown colorless SCN is added to the equilibrium mixture. d. Pb2 (aq) +2CI (aq) PbCl,(s) + heat; colorless white solid colorless Pb2+ is added to the equilibrium mixture. СH. colorless gas С-Н.1 colorless gas +heat; + e. violet gas A catalyst is added to the equilibrium mixture.

Answer 1

1)

Increasing Temperature will shift the reaction in a direction which absorbs heat as per Le chatelier Principle

Forward reaction is endothermic in nature

hence, forward reaction will be favoured

So, Equilibrium moves to product side

Blue color will be observed

2)

Adding reactant will shift the reaction in the direction of product as per Le chatelier Principle

So, Equilibrium moves to product side

Blue color will be observed

3)

Adding reactant will shift the reaction in the direction of product as per Le chatelier Principle

So, Equilibrium moves to product side

Red color will be observed

4)

Adding reactant will shift the reaction in the direction of product as per Le chatelier Principle

So, Equilibrium moves to product side

White solid precipitate will be observed

5)

Catalyst doesn't affect equilibrium

So, No effect on equilibrium