Flame test lab report
Aseel Muqbel
15/2/2015
11th D
Flame Test
Intro:
The flame test is a procedure used by chemists to identify the presence of specified metal ions, based on the color the flame that appears along with it when it 's heated.
Our flame test was in lab class, where the main aim was to tested different solid metals in the flame in order to observe the wide variety of colors those chemicals also sometimes compounds (by mixing them) they produced, the second one was to identify unknown metals based on their flame color .
Based on our chemistry classes there are two ways of getting the atoms excited:
a) Through heating ; example by using flame as in the flame test so the atom electrons can be induced to absorb energy and jump to an excited energy through jumps called ( Quantum Jump: This is when electrons jump to an excited state) the they get back to their ground state by emitting a photon , the amount of energy in that photon determines its color ;( red for the lowest energy of visible light, increasing energy through the rainbow of orange, yellow, green, blue, indigo, and finally violet for the highest energy of visible light.) Photons outside the visible spectrum may also be emitted, but we cannot see them as we learned before. Based on the emission spectrum of the element, the compound will turn the flame a characteristic color. This technique of using certain chemical compounds to color flames is widely used in pyrotechnics to produce the range of colors seen in a fireworks display.
b) Atomic absorption (electric discharge) : spectrometer ; by passing electric discharge : as we see the emission spectrum that shows colors of different spectrums hydrogen for example shows 4 colors …etc
Materials:
1- Benson burner
2- A wire loop ( wake sure it 's clean )
3- 4 filter papers
4- 4 Unknown test solid as directed by instructor (potassium , sodium , calcium , barium / chloride )
5- A beaker
6- diluted HCL ( to clean the wire loop with it )
7- A spatula
15/2/2015
11th D
Flame Test
Intro:
The flame test is a procedure used by chemists to identify the presence of specified metal ions, based on the color the flame that appears along with it when it 's heated.
Our flame test was in lab class, where the main aim was to tested different solid metals in the flame in order to observe the wide variety of colors those chemicals also sometimes compounds (by mixing them) they produced, the second one was to identify unknown metals based on their flame color .
Based on our chemistry classes there are two ways of getting the atoms excited:
a) Through heating ; example by using flame as in the flame test so the atom electrons can be induced to absorb energy and jump to an excited energy through jumps called ( Quantum Jump: This is when electrons jump to an excited state) the they get back to their ground state by emitting a photon , the amount of energy in that photon determines its color ;( red for the lowest energy of visible light, increasing energy through the rainbow of orange, yellow, green, blue, indigo, and finally violet for the highest energy of visible light.) Photons outside the visible spectrum may also be emitted, but we cannot see them as we learned before. Based on the emission spectrum of the element, the compound will turn the flame a characteristic color. This technique of using certain chemical compounds to color flames is widely used in pyrotechnics to produce the range of colors seen in a fireworks display.
b) Atomic absorption (electric discharge) : spectrometer ; by passing electric discharge : as we see the emission spectrum that shows colors of different spectrums hydrogen for example shows 4 colors …etc
Materials:
1- Benson burner
2- A wire loop ( wake sure it 's clean )
3- 4 filter papers
4- 4 Unknown test solid as directed by instructor (potassium , sodium , calcium , barium / chloride )
5- A beaker
6- diluted HCL ( to clean the wire loop with it )
7- A spatula
References: EXPERIMENT 3 - Flame Tests & Electron Configuration [PDF] http://swc2.hccs.edu/pahlavan/intro_labs/Exp_5_Flame_Tests_and_Electron_Configuration.pdf Aidan Sterk 's Digital Portfolio : 10th Grade > chemistry Labs> Flame Test Lab https://sites.google.com/a/hightechhigh.org/aidan-sterk-s-digital-portfolio/home/10th-grade/10th-grade-chemistry-and-math/chemistry-labs/flame-test-lab Fig 1.1 : my notebook / Fig 1.2 : Google images ( Metal ion flame test ) Fig 1.2