Flame Test Lab Davids Digital Portfolio Possible sources of error in this experiment were that the nichrome wire may not have been fully cleaned off every time, the color might have looked different because of other light sources, and there could have been particles in the bottom of the Bunsen burner. 2. NaCl and NaNo3 both turned the color orange. seen as specific colors of light. Each. Conclusion Of The Flame Test Lab Free Essays. This experiment will be conducted using the same spatula, the same Bunsen burner, the same kind of acid and nitrate bonded to every one of the metals. Every atom has specific orbital energy levels around the nucleus where electrons can be Procedure: The equipment was cleaned off and put away at the end of the experiment. Repeat if necessary. The purpose of this lab is to observe and identify metallic ions using flame tests. plain cotton swab which did not give-off a different colored flame from the flame itself was used Academia.edu no longer supports Internet Explorer. The relationship between energy and frequency is that when the frequency of a wave increased the energy increases and the wavelength shortens. Acknowledgments: The author of this paper thanks Union Springs High School for use of their facilities to conduct this experiment with. Since a specific energy is needed to radiate specific light color for every cation, all compounds containing similar metal cations have the same flame colors observed. Emission spectrum, Flame Tests Some of the salts, Premium consequently requires much more energy for its electrons to be excited. 12.01.2010 For this lab we got a whole bunch of compounds and burned them to observe the flame and frequency based off the color of the flame. Table 2 shows that you can identify a metal in a compound by using a flame test. Every element has a signature emission spectrum that can be used to differentiate between one element and another. Ideally, a lab report begins with an introduction and ends with a conclusion. Conservation of energy, Timothy Johns Potassium, Background Flame tests are useful means of determining the composition of substances. Record your observations as you go. The flame test could possibly read invalid if there is still a trace of the previous substance still in the burner or if there is a trace of the substance in the current substance that is being tested. Example; Studylib. If you teach high school chemistry, you likely have access to bunsen burners, inoculating loops, goggles, and a stock room full of chemicals. The sun is related because the electrons are constantly being heated, going to excited state, dropping down to ground state, and then letting out the absorbed energy into light. Compliance to GAAP C. contribution approach income statement D. External users, Problem 5 - 35 If a jet is inclined upward 30 from the horizontal, what must be its velocity to reach over a 3-m wall at a horizontal distance of 18 m, neglecting friction? : an American History (Eric Foner), The Methodology of the Social Sciences (Max Weber), Biological Science (Freeman Scott; Quillin Kim; Allison Lizabeth), Chemistry: The Central Science (Theodore E. Brown; H. Eugene H LeMay; Bruce E. Bursten; Catherine Murphy; Patrick Woodward), Forecasting, Time Series, and Regression (Richard T. O'Connell; Anne B. Koehler). Experiment #1: Flame Test. To determine the flame color of liquid compounds , the cotton swab was dipped in 7. a. Flame Test Lab. 9@"}=M i~?(z)ESa(AdUW7HDT bJ'a#0y}8!olR.@+. This experiment will benefit people who investigate fires. 1. contain Ca2+ cations give off the same flame color which is red-orange. Experiment: In order to perform this project, we must use Iodine on any sample can detect starch by changing the color of the tested area to dark blue. What metal ions are in the unknown solutions A and B from the barrels on the vacant lot? Table 1 proves my hypothesis to be correct. 1- Benson burner. This is known as the excited state. The cobalt glass filters out the yellow wavelengths of light by absorbing it, and lets you see higher energy light better. After several tests for each solution it was determined that the accepted values for each solution, in order, were: Ba(NO3)2, yellow-green; Cu(NO3)2, green; LiNO3, red; KNO3, light violet; NaCl, deep/dark yellow; Ca(NO3)2. Conclusion After doing flame test, solubility test and PH test, the groups able to identify the unknown compound, after all of the tests and reactions were performed, it was found that the unknown compound was chlorine, it is solubility in the water. More experiments can be done with machines to find the exact wavelengths of light for every element. Chemical element (being released) by the electrons to go back to their most stable state is specific and unique for Flame Test Lab. Purpose/Objective: The ground state is the normal electron configuration of atoms or ions in an element. Procedure: Once the wire is clean, dip it into one of the solutions, place the wire in the flame, and observe the color of the flame. Sodium Chloride Flame Test Lab Purpose/Objective: To observe the colors produced when elements are put into a flame and to prove when electrons jump down from higher layers they release energy in the form of light. CONCLUSION . https://shipseducation.com/training/test-answers/. Copper, Premium Flame test involves placing a sample of an element or compound in a non-luminous flame and observing the resulting color of the flame. In order for these electrons to go back to their ground state, they need to release energy (electromagnetic radiation) in a very specific wavelength in the visible spectrum which can be seen as specific colors of light. Dip the wire into the solid you're testing, making sue that a sample sticks to the wire. What could the student do to correctly identify these substances? The other cation test that leads to conclusive results for this experiment is the NaOH test, where aqueous NaOH solution is added to the unknown compound solution. It was already known and observed that metal cations are the ones responsible for the color of the flames produced by the compounds. endobj Most salts contain a metal and a non-metal. This Lab attempted to prove that when electrons are excited and then calm, they emit a color specific to the element. It can also help one determine what metal to use in fireworks to portray a certain color. This excited configuration is unstable, Premium Flame Test Lab Conclusion By Alexander Stark This experiment also shows that a metal can be identified by looking at the color of the flame and matching it to previous data results. Lab Report: Flame Test Essay by thebeckita , High School, 11th grade , January 2006 download word file , 2 pages download word file , 2 pages 0.0 0 votes The heat of the flame excites the electrons of the metals ions, causing them to emit visible light. Possible sources of error in this experiment were that the nichrome wire may not have been fully cleaned off every time, the color might have looked different because of other light sources, and there could have been particles in the bottom of the Bunsen burner. The data concluded that majority of the tests the water was subjected to exhibit an absence of many chemicals. The metallic ion produces a characteristic color in a flame test, regardless of the compound used . |Lithium Chloride, Premium Potassium Based on the table above, compounds that have similar metal cations give-off similar flame color as explained by unique electromagnetic radiation released when excited electrons go back to their ground state. Elements are classed into metal and non-metals. Copper Nitrate Summary endobj it can be concluded that the cations are the ones responsible for the unique flame color of the Using the information learned about what color would you predict that copper nitrate would burn? When they see a color they'll know immediately what element it is based on its color. The experiment was conducted by burning a salt and recording the color of the flame. This test showed that there is a direct coloration between the heat energy being expelled and the movement of electrons from one energy level to the next. The colors observed during the flame test result from the excitement of the electrons caused by the increased temperature. View |Chemical Name: |Hazards: | Electromagnetic radiation Purpose: To find out the unknown compound from known compounds and the color of the flame. When Bunsen burner is not being used, leave on the orange flame. this experiment was to use a systematic battery of tube tests and being used as a food additive in many food products. Colorful light emissions are applicable to everyday life. Record the results of your calculations in the table below. Purpose: To observe the colors produced when compounds are introduced into a flame and the electrons become excited. The cotton swab served as a negative control. Materials four Nalgene aerosol spray bottles containing solutions of copper acetate, potassium acetate, strontium nitrate, and sodium acetate in ethanol propane torch Experiment #1: Flame Test banawis hjc, baluyot kje, bullo pvgd. Management 3. If a different chemical is burned, then the color it emits when burned will FLAME TEST LAB PROCEDURE Free photo gallery. It is primarily used to observe and analyze the presence of certain elements in the given compound or salt. Instrumental methods of analysis are faster, and more accurate and more sensitive than simple chemical tests.. Purpose The purpose of this lab was to reinforce the examination of wavelengths in photons discharged from atoms as they move from high energy to low energy, atomic emmision. Hydrogen, Livana As flash point and book for operations involving mixtures and this report form below. A positive test for the bile the composition and thickness of elements of the cell wall. Generally, the flame test observes the occurrence of metal ions in a compound. Was to use in fireworks to portray a certain color and then calm, they a... The table below many chemicals is red-orange, leave on the orange flame ideally, a lab report with. 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