Inorganic Tests Flashcards
(23 cards)
Why do we add nitric acid to a solution before we test for halides?
- to remove any other ions that could form a precipitate with silver nitrate i.e. carbonate ions
How do we test for chloride ions?
- add HNO3
- add AgNO3
- white precipitate forms
How do we test for bromide ions?
- add HNO3
- add AgNO3
- cream precipitate forms
How do we test for iodide ions?
- add HNO3
- add AgNO3
- yellow precipitate forms
Summarise AgCl’s solubility in ammonia
- soluble in dilute NH3
- soluble in conc. NH3
Summarise AgBr’s solubility in ammonia
- insoluble in dilute NH3
- soluble in conc. NH3
Summarise AgI’s solubility in ammonia
- insoluble in dilute NH3
- insoluble in conc. NH3
Flame test result for lithium ions
- red
Flame test result for sodium ions
- yellow/orange
Flame test result for potassium ions
- lilac
Flame test result for rubidium ions
- red/purple
Flame test result for caesium ions
- blue
Flame test result for calcium ions
- brick red
Flame test result for strontium ions
- crimson
Flame test result for barium ions
- apple green
What occurs when dilute NaOH solution is added to a solution containing magnesium ions?
- white precipitate forms
What occurs when dilute NaOH solution is added to a solution containing calcium ions?
- slightly soluble white precipitate forms
What occurs when dilute NaOH solution is added to a solution containing strontium ions?
- no observable change
What occurs when dilute NaOH solution is added to a solution containing barium ions?
- no observable change
What occurs when Na2SO4 solution is added to a sample containing magnesium ions?
- no observable change
What occurs when Na2SO4 solution is added to a sample containing calcium ions?
- thin white precipitate forms
What occurs when Na2SO4 solution is added to a sample containing strontium ions?
- white precipitate forms
What occurs when Na2SO4 solution is added to a sample containing barium ions?
- thick white precipitate forms
