Flame Lab
Flame Lab
Objective:
How an electron absorbs energy and re-emits it as light and why different elements have different spectra. Also to learn how to use flame tests to determine the identity of unknown mixtures.
Hypothesis:
We know that certain compounds will burn certain flame colors because they emit different wave lengths.
Introduction:
Neils Bohr made the “Bohr’s Model” in 1922, he found that electron travel in specified fields – which, when excited, will jump to different rings. The farther they go the longer it will take them to go to ground state. Wave lengths measure the distance between corresponding points on an adjacent waves. The frequency shows how many waves pass a specified line in a given period of time. The distance between the waves (troughs) determine the speed of the waves. This means that the closer the waves the faster the frequency, and the farther the waves the slower the frequency – so; strength and amount of energy in a wave depends on speed.
With this knowledge, I will know/understand the lab we will be doing. With the use of fire, assorted elements and minerals, and water we will learn how to distinguish chemicals by color of flame. Certain elements will burn certain colors which will help us to figure out which element it is.
Materials:
Safety goggles
Matches
Weighing dishes, 6
Watch Glasses, 6
Wooden Splints, 6
Water, 250 mL
Alcohol, 5 mL
Calcium Chloride
Copper Chloride
Lithium Chloride
Potassium Chloride
Sodium Chloride
Strontium Chloride
Procedure:
1. Put on safety goggles
2. Wear gloves when handling chemicals
3. Obtain a 250 – mL beaker half-full with water. Obtain 6 wooden splints
4. Obtain six weighing dishes labeled “CaCl2”, “CuCl2”, “LiCl”, “NaCl”, “KCl”, “SrCl2” – each containing a small scoopful of each metallic solid in the corresponding weighing dish
5. Put 10 drops of alcohol on the solid in the watch glass
6. Light a match – wooden splint – watch glass. Observe the
Objective:
How an electron absorbs energy and re-emits it as light and why different elements have different spectra. Also to learn how to use flame tests to determine the identity of unknown mixtures.
Hypothesis:
We know that certain compounds will burn certain flame colors because they emit different wave lengths.
Introduction:
Neils Bohr made the “Bohr’s Model” in 1922, he found that electron travel in specified fields – which, when excited, will jump to different rings. The farther they go the longer it will take them to go to ground state. Wave lengths measure the distance between corresponding points on an adjacent waves. The frequency shows how many waves pass a specified line in a given period of time. The distance between the waves (troughs) determine the speed of the waves. This means that the closer the waves the faster the frequency, and the farther the waves the slower the frequency – so; strength and amount of energy in a wave depends on speed.
With this knowledge, I will know/understand the lab we will be doing. With the use of fire, assorted elements and minerals, and water we will learn how to distinguish chemicals by color of flame. Certain elements will burn certain colors which will help us to figure out which element it is.
Materials:
Safety goggles
Matches
Weighing dishes, 6
Watch Glasses, 6
Wooden Splints, 6
Water, 250 mL
Alcohol, 5 mL
Calcium Chloride
Copper Chloride
Lithium Chloride
Potassium Chloride
Sodium Chloride
Strontium Chloride
Procedure:
1. Put on safety goggles
2. Wear gloves when handling chemicals
3. Obtain a 250 – mL beaker half-full with water. Obtain 6 wooden splints
4. Obtain six weighing dishes labeled “CaCl2”, “CuCl2”, “LiCl”, “NaCl”, “KCl”, “SrCl2” – each containing a small scoopful of each metallic solid in the corresponding weighing dish
5. Put 10 drops of alcohol on the solid in the watch glass
6. Light a match – wooden splint – watch glass. Observe the