Tagged: Chemistry-11
Flame lab
Application questions:
What particles are found in the chemicals that may be responsible for the production of colored light?
The photons. When a quantum leap happens the photons are responsible for emiting the light.
Why do different chemicals emit different colors of light?
They have different photons which have different wave lengths
Why do you think the chemicals have to be heated in the flame first before the colored light is emitted?
Because to make a quantum leap you need a source of energy which the flame provides.
Coloured light is emitted constantly around us during our everyday experiences. List 5 examples of coloured light emissions you have seen in the last week.
LED light, sun, fluorescent, fire, traffic lights
Write out the electronic configuration for each of the metallic ions to be investigated.
Copper ion: 1s2 2s2 2p6 3s2 3p6 3d9
Strontium ion: 1s2 2s2 2p6 3s2 3p6 4s2 3d10 4p6
Lithium ion: 1s2
Potassium ion: 1s2 2s2 2p6 3s2 3p6
Calcium ion: 1s2 2s2 2p6 3s2 3p6
Zinc ion: 1s2 2s2 2p6 3s2 3p6 3d10
Why are all the metallic ions paired with nitrate?
All the ions are paired with nitrate due to nitrate being soluble in water. Since all metals except for a select few are soluble, if you didn’t have the nitrates the metals would not be able to create the liquid spray we used.
What wavelengths correspond to the visible spectrum? Which colour has the shortest wavelength? The longest? What unit are wavelengths measured in?
The wavelengths from 400nm-700nm correspond to the visible spectrum. Violet is the shortest wavelength and red has the longest. Wavelengths are measured in nanometers to represent how long the actual wavelength is.