WorksheetsIdentification of Cations
Total questions: 6
Worksheet time: 3mins
Which one of the following metallic ions forms a white
precipitate which remains insoluble in excess aqueous
sodium hydroxide?
Zn2+
Ca2+
Pb2+
When an excess aqueous ammonia is added to a sample solution, no ppt is formed. The sample contains
Ca2+
Zn2+
Pb2+
Which one of the following metallic ions forms a white
ppt which dissolves in an excess of either aqueous
sodium hydroxide or aqueous ammonia to form a colourless solution?
Zn2+
Pb2+
Ca2+
Cu2+
Which one of the following metallic ions form(s) a precipitate which dissolves in an excess of aqueous ammonia?
Zn2+
Pb2+
Cu2+
Ca2+
Fe2+
Which of the following shows the correct ionic equation for the precipitate formed when aqueous NaOH is added to a solution containing Fe3+ ions?
Fe3+(aq) + OH-(aq) → FeOH (s)
Fe2+(aq) + 2OH-(aq) → Fe(OH)2 (s)
Fe3+(aq) + OH-(aq) → Fe(OH)3 (s)
Fe3+(aq) + 3OH-(aq) → Fe(OH)3 (s)
Which of the following shows the correct ionic equation for the precipitate formed when aqueous NH3 is added to a solution containing Zn2+ ions?
Zn+(aq) + OH-(aq) → ZnOH (s)
Zn2+(aq) + OH-(aq) → Zn(OH)2 (s)
Zn+(aq) + 2OH-(aq) → Zn(OH)2 (s)
Zn2+(aq) + 2OH-(aq) → Zn(OH)2 (s)
