[Co(H_2O)_6]_((aq))^(3+) + 4Cl_((aq))^(-) hArr [CoCl_4]_((aq))^(2-) + 6H_2O this reaction is endothermic and if blue colour is due to CoCl_(4(aq))^(2-). If this mixture kept in ice than what happen ?

[Co(H_2O)_6]_((aq))^(3+) + 4Cl_((aq))^(-) hArr [CoCl_4]_((aq))^(2-) +

1.	[Co(H_2O)_6]_((aq))^(3+) + 4Cl_((aq))^(-) hArr [CoCl_4]_((aq))^(2-) + 6H_2O this reaction is endothermic and if blue colour is due to CoCl_(4(aq))^(2-). If this mixture kept in ice than what happen ?
Answer» Solution :This reaction is endothermic. If placed in ICE so temperature DECREASES than heat release and reaction proceed in REVERSE direction and blue colour of `CoCl_4^(2-)` decreases and PINK colour of `[Co(H_2O)_6]^(3+)`increases.