Explain how (in procedures step format), the reaction of Ni(OH)2 with NH3 would

Question

Explain how (in procedures step format), the reaction of Ni(OH)2 with NH3 would enable you to separate a mixture of iron(III) and nickel(II) hydroxide.

I need help with question a but can you tell me if my answer is right for b Thank you (a. has to be in procedures step format, I am confused about this can I have easy to follow steps. thanks again

b Explain why you can dissolve Ni(OH)3 in aqueous ammonia. The compound Ni(OH)2 is very much soluble in ammonia, since it will form a complex precipitate.

Explanation / Answer

Solution:

Ni(OH)2 (s) + 6 NH3 (aq) --> [Ni(NH3)6]2+ (aq) + 2 (OH-) (aq)

The above is the balance equation for the given reactants and forms the soluble complex of [Ni(NH3)6]2+ , when the mentioned reactants are used in separation of iron(III) resuls in formation of insoluble complex precipitate with soluble aqueous layer of nickel (II) hydroxide.

The complex Ni(OH)2 is easily dissolvable in solution even if it forms precipitate, the effect is due to the capability of electron transfering OH- ions to the solution, which favors the easy dissociation of the atom/ molecules.

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