Chemical Equations for Anion Tests

Chloride Cl-

AgNO3 + NaCl → AgCl (ppt) + NaNO3

Phosphate PO4 3-

Ammonium molybdate

Conc. HNO3 (nitric acid)

Sulfate SO4 2-

BaCl2 + Na2SO4 → BaSO4 (ppt) + 2NaCl

BaSO4 (ppt) + HCl → N.R

Sulfite SO3 2-

BaCl2 + Na2SO3 → BaSO3 (ppt) + 2NaCl

BaSO3 (ppt) + HCl → BaCl2 (aq) + H2SO3 (aq)

Carbonate CO3 2-

2HCl + Na2CO3 → CO2 (g) + 2NaCl (aq) + H2O

MgSO4 + Na2CO3 → MgCO3 (ppt) + Na2SO4 (aq)

Hydrogen carbonate

HCl + NaHCO3 → CO2 (g) + NaCl (aq) + H2O

MgSO4 + 2NaHCO3 → Mg(HCO3)2 (aq) + Na2SO4 (aq)

Nitrate NO3-

Fresh iron (II) sulphate

Conc. H2SO4