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How to test for ammonium ion (reagents and observations). Add the equation
Add dilute NaOH and warm gently. Litmus paper should go from red to blue.
NH4+ (aq) + OH- (aq) —> NH3 (g) + H2O (l)
How to test for carbonate ion (reagents and observations). Add the equation.
Add dilute acid. Should produce effervescence and limewater should go cloudy.
CO3 (aq) + 2H (aq) —> CO2 (g) + H2O (l)
How to test for sulfate (reagents and observations). Add the equation.
Add barium ions e.g BaCl2. Should produce white precipitate.
Ba (aq) + SO4 (aq) —> BaSO4 (s)
How to test for chloride ions (reagents and observations). Add the equation.
Add HNO3 to remove carbonate ions. Add AgNO3 and white precipitate should form. Dissolves adding dilute aqueous ammonia
Ag+ (aq) + Cl- (aq) —> AgCl
How to test for bromide.
HNO3 and AgNO3. Forms cream precipitate. Partially dissolves in dilute ammonia but fully dissolves in concentrated.
How to test for iodide.
HNO3 and AgNO3. Forms yellow precipitate. Doesn’t dissolve in aqueous ammonia.
What is the correct order for anions tests.
Carbonate, Sulfate, halide