| How can you find out Metal Ions?
-Lithium?
-Sodium?
-Potassium?
-Calcium?
-Copper? | -Simply put the Substance in the Flame, and use the Colour to see what Element it would Refer to
-Lithium, L+, gives a Crimson Red Flame
-Sodium, Na+, gives a Yellow Flame
-Potassium, K+, gives a Lilac Flame
-Calcium, Ca²+, gives a Brick Red Flame
-Copper, Cu²+, gives a Blue-Green Flame |
| How to carry out the Flame Test? [Test for Metal Ions] | -First, clean a Nichrome Wire Loop, by dipping it in Hydrochloric Acid, and then rinsing it via Deionised Water
-Then, dip said Wire Loop into the Sample of the Metal Compound, and put the Loop in the Blue Part of the Bunsen Burner, because its the Hottest Part
-Record what colour the Flame give you |
| How else can you test for Metal Ions? | -Some Metal Ions, when with Sodium Hydroxide, can make a Coloured Precipitate
-Simply add Sodium Hydroxide to the Solution of which contains the Mystery Compound
-If a Hydroxide Precipitate is present, you can be able to Identify what Element it was due to the Colour |
| Using the Sodium Hydroxide / Metal Ions Test, what Colour Precipitate would appear with
Calcium, Ca²+
Copper, Cu²+
Iron (II), Fe²+
Iron (III), Fe³+
Zinc, Zn²+
Give the Equations | -For Calcium, a White Precipitate would Form
[Ca²+ + 2OH- --> Ca(OH)₂]
-For Copper, a Blue Precipitate would Form
[Cu²+ + 2OH- --> Cu(OH)₂]
-For Iron (II), a Green Precipitate would Form
[Fe²+ + 2OH- --> Fe(OH)₂]
-For Iron (III), a Brown Precipitate would Form
[Fe³+ + 3OH- --> Fe(OH)₃]
-For Zinc, a White Precipitate would form, but then Redissolves to make a Colourless Solution
[Zn²+ + 2OH- --> Zn(OH)₂] --> [Zn(OH)₂ + 2OH- --> Zn(OH)₄²-] |
