Tests For Anions Flashcards
Chloride ions test
Add AgNO3 solution to solution of the solid
Chloride ions observation
White precipitate formed which is soluble in dilute ammonia solution
Chemical Formula for Chloride ions test
Ag+ + Cl- —> AgCl (precipitate)
Test for sulfate/sulfite ions
Add BaCl2 solution to a solution of the solid
Observation for sulfate/sulfite ions test
White precipitate formed
Chemical formula for sulfate/sulfite ions test
Ba2+ + SO42- —> BaSO4
Ba2+ + SO32- —> BaSO3
Distinguishing test for Sulfate/Sulfite
Add dilute HCl
Observation of distinguishing test for Sulfate/Sulfite
If precipitate remains= sulfate
If precipitate dissolves= sulfite
Chemical formula for sulfate/sulfite distinguishing test
BaSO4 + HCl —> no reaction
SO32- + 2H+ —> SO2 + H2O
Test for Carbonate/Hydrogen-carbonate ion
Add dilute HCl to the solid
Observation of test for Carbonate/Hydrogen-carbonate ions
Fizzing- gas given off that turns limewater milky
Chemical formula for test for Carbonate/Hydrogen-carbonate ions
CO32- + 2H+ —> CO2 + H2O
HCO3- + H+ —> CO2 + H2O
Ca(OH)2 + CO2 —> CaCO3(precipitate) + H2O
Distinguishing test for Carbonate/Hydrogen-Carbonate ions
Add MgSO4 to a fresh solution of the solid
Observation of distinguishing test for Carbonate/Hydrogen-Carbonate ions
White precipitate formed- Carbonate
No precipitate forms- hydrogen-carbonate (boiling gives precipitate)
Chemical formula for distinguishing test of Carbonate/Hydrogen-carbonate ions
Mg2+ + CO32- —> MgCO3 (precipitate)
Mg 2+ + HCO3- —> Mg(HCO3)2
Mg(HCO3)2 —> MgCO3(precipitate) + CO2 + H2O