Chemistry cations test and result GCSE O level

Front

Calcium (Ca2+) when aq sodium hydroxide is added

Back

White ppt and insoluble in excess

Front

Calcium (2+) when aq ammonia is added

Back

No ppt or very slight white ppt

Front

Zinc (Zn2+) when aq sodium hydroxide is added

Back

White ppt, soluble in excess giving a colourless solution

Front

Zinc (Zn2+) when aq ammonia is added

Back

White ppt, soluble in excess giving a colourless solution

Front

Aluminium (Al3+) when aq sodium hydroxide is added

Back

White ppt soluble in excess giving a colourless solution

Front

Aluminium (Al3+) when aq ammonia is added

Back

White ppt, insoluble in excess

Front

Copper (II) (Cu2+) when aq sodium hydroxide is added

Back

Light blue ppt, insoluble in excess

Front

Copper (II) (Cu2+) when aq ammonia is added

Back

Light blue ppt, soluble in excess giving a dark blue solution

Front

Iron (II) (Fe2+) when aq sodium hydroxide is added

Back

Green ppt, insoluble in excess

Front

Iron (II) (Fe2+) when aq ammonia is added

Back

Green ppt, insoluble in excess