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which of these ions in HCl(aq) will affect the equilibrium of CoCl2 and what will this effect be

Submitted by brandi11 on Tue, 07/12/2011 - 10:54

1.  What ions are present in a solution of HCl? Theoretically, which of these ions will affect the equilibrium of CoCl2 and what will this effect be? 

 

2.  What ions are present in a solution of AgNO3? Theoretically, which of these ions will affect the equilibrium in:

Co(H20)6^2 + (aq) + 4 Cl- (aq) <------> CoCl4 ^2- (aq) + 6H2O (l)

    and what will its effect be? Explain why you expect this to happen. 

 

3.  Is the reaction of:       Co(H20)6^2 + (aq) + 4 Cl- (aq) <------> CoCl4 ^2- (aq) + 6H2O (l)     exothermic or endothermic? 


2. In aqueous solution, AgNO3 will be dissociated into Ag+ and NO3- ions.

Silver nitrate (AgNO3) solution is the reagent to detect chloride ions (Cl-), because they react to from insoluble silver chloride (AgCl).

Ag+ + Cl- ---> AgCl (s)

The silver ion would cause the chloride ion concentration to decrease, so more of the cobalt would be present as

Co(H2O)62+ .