Chemistry tests for Anions and Cations

Turns damp red litmus paper blue

Ammonium NH4+

White ppt formed in Sodium Hydroxide and Ammonia, insoluble in excess

Aluminum Al3+

White ppt formed in Sodium Hydroxide and Ammonia, soluble in excess

Zinc Zn2+

White ppt formed in Sodium Hydroxide, none formed in Ammonia

Calcium Ca2+

Light blue ppt formed in Sodium Hydroxide and Ammonia

Copper Cu2+

(Lime) Green ppt formed in Sodium Hydroxide and Ammonia

Chromium Cr3+

(Forest) Green ppt formed in Sodium Hydroxide and Ammonia

Iron (II) Fe2+

Red-brown ppt in Sodium Hydroxide and Ammonia

Iron (III) Fe3+

CO2 produced (Makes lime water cloudy) with acid

Carbonate CO2-

White ppt formed in Nitric acid, then adding aqueous Silver nitrate

Chloride Cl-

Cream ppt formed in Nitric acid, then adding aqueous Silver nitrate

Bromide Br-

Yellow ppt formed in Nitric acid, then adding aqueous Silver nitrate

Iodine I-

Ammonia produced (Turns damp red litmus paper blue) when in Sodium hydroxide and aluminum is added

Nitrate NO3 -

White ppt formed in Nitric acid with aqueous barium nitrate

Sulfate SO4 2-

SO2 produced turning potassium manganate from purple to colorless when warmed HCL is added

Sulfite SO3 2-