Flame Test Flashcards
What is the flame test used for?
The flame test is used to identify metal ions based on the characteristic colors they emit when heated in a Bunsen burner flame.
Which metals can be identified using the flame test?
Lithium, sodium, potassium, barium, strontium, and copper.
What color does sodium emit in a flame test?
Yellow
What chemical is used with a Bunsen burner?
Hydrochloric acid
Which chemical requires careful handling?
Hydrochloric acid
What is the first step for wire cleaning in a flame test?
Dip in concentrated hydrochloric acid
What color flame does sodium produce in a flame test?
Yellow
What color flame does lithium produce in a flame test?
Deep red
What color flame does potassium produce in a flame test?
Lilac
What color flame does barium produce in a flame test?
Yellow-green
What color flame does strontium produce in a flame test?
Red
What color flame does copper produce in a flame test?
Blue-green
Why do metals produce characteristic colours in a flame?
Electrons in metal atoms absorb energy from the flame and move to higher energy levels. As they return to lower levels, they emit light.
How can cross-contamination be avoided during flame tests?
Use separate wires for each test or thoroughly clean the wire with hydrochloric acid between tests.
What is the first step in the method of using wooden splints for a flame test?
Soak wooden splints in water overnight.
