NAOH cations colours

Question 1

Cation (Ion)

Answer 1

Add NaOH - Precipitate Formed

Question 2

Cu²⁺

Answer 2

Blue precipitate (Cu(OH)₂)

Question 3

Fe²⁺

Answer 3

Green precipitate (Fe(OH)₂)

Question 4

Fe³⁺

Answer 4

Brown precipitate (Fe(OH)₃)

Question 5

Mg²⁺

Answer 5

White precipitate (Mg(OH)₂)

Question 6

Ca²⁺

Answer 6

White precipitate (Ca(OH)₂)

Question 7

Al³⁺

Answer 7

White precipitate (Al(OH)₃), dissolves in excess to form colourless solution