Note the colour and record the result. Those transitions emit light of very specific frequencies, characteristic of the chemical element itself. Some student complete the lab in class and turn in but I allow students to finish and turn in the next day if they need extra time.
The test has difficulty detecting small concentrations The flame test lab some elements, while too strong a result may be produced for certain others, which tends to cause fainter colors to not appear. In high-school chemistry courses, wooden splints are sometimes used, mostly because solutions can be dried onto them, and they are inexpensive.
Their energy is directly proportional to the frequency of the light remember: This would have caused the stick to burn quickly which would cause the color to be orange and wavelength to be 6.
Electrons in the excited state back to the ground state was unstable, so that the difference in energy as the energy is emitted. Therefore, the flame gets the color, which is primarily determined by properties of the chemical element of the substance being put into flame.
When an electron is in a higher-energy shell it is said to be in an excited state. The light produced by very hot atoms in the gaseous state is a unique spectrum for each element. This gives rise to a way to uniquely identify elements based on their spectrum.
Results[ edit ] The flame test is relatively quick and simple to perform, and can be carried out with the basic equipment found in most chemistry laboratories. Submit your answers to these questions on a separate sheet of paper if more room is needed before you begin the lab.
The spectroscope was difficult to read. Put on lab apron.
Samples are usually held on a platinum wire cleaned repeatedly with hydrochloric acid to remove traces of previous analytes.
The use of cotton swab  or melamine foam used in "eraser" cleaning sponges  as a support have also been suggested. Burn the loop end of the wire to remove any dust.
When making observations be sure to use all of your senses except taste. These colours are also often used in fireworks to give the different colours we see when they burn. The objectives of this lab are to: a) Perform flame tests of metal cations in order to observe their characteristic colors, b) Perform calculations to determine the.
A flame test is a procedure used to test qualitatively for the presence of certain metals in chemical compounds. When the compound to be studied is excited by heating it in a flame, the metal ions will begin to emit light.
Flame Test Lab Essay Sample. Flame Test Lab. Your company has been contracted by Julius and Annette Benetti. They are worried about some abandoned, rusted barrels of chemicals that their daughter found while playing in the vacant lot behind their home.
Lab: Flame Tests Note for Teachers: Showing the NOVA film about fireworks (titled Fireworks!) before or after this lab activity may enhance the learning it is meant to produce. Also, I have produced a video suitable as an introduction to this lab. Flame Test Lab. Purpose: Examine the color differences made when burning certain metallic ions.
Be able to identify unknown metallic ions when performing a flame test.
Procedure: 1. Receive the solid compound on a clean watch glass. 2. Add 5 drops of methanol to the solid compound. 3.
Stir the compound and methanol to well incorporate the two. Flame Test: Red, Green Blue, Violet? Activity—Flame Test Worksheet 1 Flame Test Worksheet By placing atoms of a metal into a heat source, electrons can be induced to absorb energy and jump to excited energy states.
Then, by emitting photos of light, they return to their ground Write a lab report with the following information included.The flame test lab