Nickel Ni2+ confirmatory tests: dimethyl glyoxime and test with NaOH and bromine water Br2 (aq)

Ni2+ tests; confirmatory tests for nickel (II) ions:

1. Dimethyl glyoxime test
Add dimethyl glyoxime CH3C(NOH)C(NOH)CH3 solution in propan-2-ol to the tested solution (solution should be neutral or alkaline).
Red precipitate formation confirms Ni2+ presence.

2. Sodium hydroxide + bromine water Br2 (aq) test
To the tested solution add NaOH followed by bromine water Br2
formation of black precipitate of Ni(OH)3 confirms Ni2+ presence in original solution
Ni(OH)2 (pale green precipitate) + ½ Br2 (aq) + OH- (aq)→ Br- (aq) + Ni(OH)3 (black precipitate)

00:00 Introduction; nickel (II) ammonia complex, nickel (II) hydroxide
00:46 Dimethyl glyoxime test for Ni2+ ions
01:47 Dimethyl-nickel (II) complex structure
02:51Soduim hydroxide + bromine water test
05:18 Two confirmatory tests for Ni2+ ions - final run

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