M3 - Qualitative Analysis Flashcards
Write an ionic equation, with state symbols, for the reaction of chloride ions and silver nitrate
Ag+ (aq) + Cl- (aq) -> AgCl (s)
What reagent(s) are required for the sulfate test?
(Acidified) Barium nitrate
What reagent(s) are required for the carbonate test?
Nitric acid
What positive observation is made for the sulfate test?
White precipitate (of BaSO4)
What is the formulae of the carbonate ion?
CO3 2-
Write an ionic equation, with state symbols, for the reaction of carbonate ions and nitric acid
CO3 2- (aq) + 2H+ (aq) -> CO2 (g) + H2O (l)
What is the order of anion tests for an unknown sample?
Carbonate And Sulfate, Halide (CASH)
What positive observation is made for the ammonium test?
Damp red litmus paper turns blue (due to alkaline gas produced)
What positive observation is made for the carbonate test?
Effervescence, fizzing, bubbling
Write an ionic equation, with state symbols, for the reaction of sulfate ions and barium nitrate
SO4 2- (aq) + Ba2+ (aq) -> BaSO4 (s)
What reagent(s) are required for the ammonium test?
Warm NaOH solution
How are silver halide precipitates distinguished?
Add dilute ammonia to each sample, only AgCl ppt dissolves.
In conc ammonia the AgBr ppt dissolves and AgI insoluble in all
Write an ionic equation, with state symbols, for the reaction of ammonium ions and sodium hydroxide
OH- (aq) + NH4+ (aq) -> NH3 (g) + H2O (l)
D
What reagent(s) are required for the halide test?
(Acidified) silver nitrate
D
D
