What are the equilibrium reactions for Cr(OH)3(s) when it comes into contact with rain water?
As we know that Cr(OH)3(s) is soluble in water.
therefore
when Cr(OH)3(s) comes into contact of rain water , then Cr(OH)3(s) dissolves in rain water
and after that Cr(OH)3 dissociates into its constituents ions Cr3+ and OH- ions
thus
the the equilibrium reactions for Cr(OH)3 (s) solubility in rain water is given as:
Cr(OH)3(s) <-----> Cr(OH)3 (aq) <------------> Cr^3+ (aq) + 3 OH- (aq)
and
the equilibrium constant for this reaction is given as :
Ksp = [Cr3+]*[OH-]^3
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