4. Inorganic Chemistry (FLAME TEST)
No description yet. This curated deck is ready for daily study.
Card preview (11)
Describe how to test a sample using flame tests
1) use a nichrome wire 2) clean wire by dipping in concentrated HCl. Hold in bunsen burner flame. 4) Do this multiple times until clean 4) if the sample isn’t powdered then grind it up 5) dip wire in fresh hydrochloric acid then in the powder and hold sample in blue bunsen flame 6) Observe the colour
Give flame colour for lithium
Scarlet red
Give the flame colour for sodium
Yellow
Give the flame colour for potassium
Lilac
Give the flame colour rubidium
Red
Give the flame colour for caesium
Blue
Give the flame colour for magnesium
No colour - no light emitted in visibe light sectrum
Give the flame colour for calcium
Brick red
Give the flame colour for barium
Green - apple green
What is the species of the metal when it is being tested in a flame test
Ion –> metal ion
Describe what happens during a flame test
When a metal ion is heated, electrons absorb energy and become excited and are promoted to a higher energy level from ground level. Electron then returns to the lower energy level As it drops, energy is emitted (released) in the form of visible light The specific colour for each ion depends on the energy emmitted