Chemical Identification Tests Flashcards
How are lithium ions identified and what is the result?
Flame test, bright red
What species would produce a yellow flame in a flame test?
Na+
How are potassium ions identified and what is the result?
Flame test, lilac
How is Ca2+ identified and what is the result?
Flame test, Brick red
What species would produce apple green flames in flame test?
Ba2+
What result would Cu2+ produce in a flame test?
Blue green
What species are identified by adding dilute nitric acid followed by silver nitrate solution?
Cl-, Br-, I-
What result does Cl- produce when mixed with silver nitrate?
- white precipitate
- dissolves in dilute ammonia
What result does Br- reduce when mixed with silver nitrate?
- cream precipitate
- dissolves in concentrated ammonia
What result does I- produce when mixed with silver nitrate?
- pale yellow precipitate
- does not dissolve in concentrated ammonia
What is the identification test and result for carbon dioxide?
- bubble through limewater
- goes cloudy
How is oxygen identified?
- apply glowing/lit splint
What is the result if oxygen is present in identification test?
- splint relights
- flame gets brighter
What species produces a squeaky pop when a lit splint is applied?
Hydrogen , H2
What is the test and result for Cl2?
- damp litmus paper
- goes red (then bleaches)
