Cations ( Memorising using the All Win Way)

Defination

Cations are metal ions

They can be identified by adding
2 reagents
Calcium Hydroxide, Ca(OH)2
Aqueous Ammonia. , NH3

O level syllubus

when ions react with sodium hydroxide/aqueous ammonia
coloured compounds or white compounds are formed

Coloured coumpounds :
Copper (2) ions
Iron (2) ions
Iron (3) ions

white ppt compounds
calcium ions
lead ions
aluminium ions
zinc ions

Colourless coumpounds
ammonium ions



All win method !!!!!

Ions. Add Sodium hyroxide/Aqueous Ammonia
Copper. Blue ppt(copper hydroxide is formed)why blue ?Cu(u is part of blue)
Iron(2). Green ppt (iron hydroxide is formed)why green ? Green (ee) is charge 2
iron(3). Red ppt (iron hydroxide is formed) why red ? ( red is 3 letters charge 3 )

white is a human nature = LAZy Cow

L= lead
A= aluminium
Z= zinc

C= calicum




how do u all win ?