Explain please The questions below refer to the following system: Cobalt chlorid

Question

Explain please The questions below refer to the following system: Cobalt chloride is added to pure water. The Co2 ions hydrate. The hydrated form then reacts with the Cl-ions to set up the equilibrium shown here: Co(H20)% 2+ +4CCoCl46H20 (pink) (blue) 33. Which statement below describes the change that the system will undergo if hydrochloric acid is added? [A] It should become more pink. [B] It should become more blue. [D] The equilibrium will shift to the left. [C] The equilibrium will shift to the right. [E] Two of these Which statement below describes the change that the system will undergo if water is added? (A] The color will become more blue. [C] The equilibrium will shift to the right. [D] More water will be produced [E] There will be less of the hydrated cobalt ion at the new equilibrium position. 34. [B] More chlorine ions will be produced

Explanation / Answer

According to the Le-Charterlier's principle,
(1) If the temperature is raised, reaction will proceed in the direction in which some heat can destroy (absorbed) so that temperature of the system remains constant.
Thus increase in temperature shifts the equilibrium in the forward direction of those reactions which proceed with absorption of heat (endothermic reactions), and in the back ward direction of those reactions which proceed with the evolution of heat (exothermic reactions)
(2) If the pressure is increased, reaction will takes place in a direction which will bring about lowering f pressure. This implies that the equilibrium will shifts in the direction which produces the smaller no. of gas molecules.
(3) If the concentration of reactants is increased or product is removed , the reaction will take place in the forward direction. If the concentration of reactants decreases or increasing the concentration of products the reaction will take place in the backward direction.
(4) Catalyst speeds up both forward & backward reactions to the same extent but does not have any effect on Equilibrium point.
(5)---> When the no. of moles of reactants & products are same the addition of inert gas has no effect
----> for a reaction at constant pressure ,addition of an inert gas will shifts the equilibrium in the direction in
which there is increase in the no . of moles of the gases

33) If HCl was added then the concentration of reactant increases there by the equilibrium shifts to forward direction so more blue will appear.

Therefore option B is correct.

34) when water was added then the concentration of products increases there by the equilibrium shifts in the backward direction there by more pink colour will appear.so more Cl- ions produced.

Therefore option B is correct.

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