Tests For Cations + Anions, Flame + Precipitate Colours

Tests For Cations + Anions Flame + Precipitate Colours For Each Metal - GCSE Chemistry

red

Flame colour of Lithium Li+

yellow

Flame colour of Sodium Na+

lilac

Flame colour of Potassium K+

orange-red

Flame colour of Calcium Ca2+

blue-green

Flame colour of Copper Cu2+

white then colourless

Precipitate colour with NaOH (Sodium Hydroxide) solution of Aluminium Al3+

white

Precipitate colour with NaOH (Sodium Hydroxide) solution of Calcium Ca2+

blue

Precipitate colour with NaOH (Sodium Hydroxide) solution of Copper Cu2+

green

Precipitate colour with NaOH (Sodium Hydroxide) solution of Iron(II) Fe2+

brown

Precipitate colour with NaOH (Sodium Hydroxide) solution of Iron(III) Fe3+

dilute nitric acid (HNO3) then a few drops of silver nitrate solution (AgNO3)

What is added to Chloride (Cl-), Bromide (Br-) and Iodide (I-) ions to form and precipitate.

white

Colour of Silver Chloride (AgCl) precipitate

cream

Colour of Silver Bromide (AgBr) precipitate

yellow

Colour of Silver Iodide (AgI) precipitate

add dilute acid and fizzing will be seen which is CO2 gas

What is the test for Carbonates?

add dilute hydrochloric acid then barium chloride solution and white precipitate will form

What is the test for Sulfate ions?

clean nichrome wire loop

What wire do you use for a flame test?

by dipping it in dilute HCl then rinsing it in distilled water

How do you clean a Nichrome wire loop?

add sodium hydroxide solution and heat it and ammonia get will be given off

How do you test for Ammonium ions (NH4+)?

damp red litmus paper turns blue

How do you test for ammonia gas?