Question

Does nickel form a precipitate when mixed with ammonia or does it form a soluble product?

Answer 1

initially it will form precipitate and with excess of ammonia it will form soluble product.

Step-by-step explanation:

The reaction of nickel with ammonia is:

With aqueous ammonia nickel precipitate out as green gelatinous Ni(OH)₂:

[light green]
`Ni^(+2)(aq) + 2 OH^(-)(aq)--->2 Ni(OH)_(2)(s)` (green colored).

If we add further more of ammonia, it will dissolve to form blue solution as:

`Ni(OH)_(2)(s) + 6NH_(3)(aq) <==> [Ni(NH_(3))_(6)]^(+2)(aq) + 2OH^(-)(aq)`

So initially it will form precipitate and with excess of ammonia it will form soluble product.

Answer 2

Nickel forms precipitate when it reacts with ammonia

Step-by-step explanation:

The reaction between Nickel and ammonia is such that produces a precipitate which dissolves when excess amount is added to it.

At first, the precipitate produces a green precipitate of Ni(OH)₂ when more ammonia is added, the precipitate eases or dissolves, to form a solution of complex ion of Nickel forms.