same flame colors observed. Proudly powered by WordPress The colors produced by the flame test are compared to known standards. Results and Discussion- The data in table 1 shows that every metal tested emits a different color during a flame test. The compounds KC4H5O6 and KCl would be good for making purple fireworks. Purpose: To find out the unknown compound from known compounds and the color of the flame. Wan Huang [ VIEW ANSWER] [ Find Similar] To better understand these concepts and make chemistry more interactive, we did an experiment about compounds element light and wavelength. Safety Requirements for this Lab: Wear goggles at all times. Copper Nitrate plain cotton swab which did not give-off a different colored flame from the flame itself was used 3. Regents Chemistry class Union Springs High School 4th period in China) until the 1830s, all fireworks were either white or orange. To determine the flame color of liquid compounds , the cotton swab was dipped in In this flame test experiment, seven different known solutions and three different unknown solutions were tested in a burner. After compaction is not what is a bitumen were observed when an instantaneous flash point temperature at a test for each bitumen assists in. Acknowledgments: The author of this paper thanks Union Springs High School for use of their facilities to conduct this experiment with. It can also help one determine what metal to use in fireworks to portray a certain color. To estimate the wavelength of light produced then calculate the frequency and energy of the light In chemistry, the flame test is a simple qualitative analysis technique to check for the presence of alkali, alkaline-earth metal ions and some transition metals. This would solve the problem of the world becoming over-populated and would help prevent the spread of disease. Potassium Management It can also help one determine what metal to use in fireworks to portray a certain color. But, when an atom is bombarded with a form of energy, such as flame, the electrons become excited and will jump to a higher energy level. Introduction/Purpose: When a certain amount of energy is supplied within an atom the electrons of that atom begin to move up the levels of electron configuration. Bunsen burner In today's lab, we will observe the visible range of light emission. Sodium chloride Flame Test Lab Introduction: For the test we had to observe characteristic colors by different salts mixed with methanol when being vaporized in a flame. The potassium sulfate had a yellow/orange and light purple color, but it was kind of hard to see, but when I looked through the cobalt glass I could see the higher energy light of violet much more clearly. Remember the metal ions are paired with a nonmetal ion in an ionic formula unit. compounds were CaCO3, CaCl 2 , KC 4 H 5 O 6 , MgSO 4 , CaSO 4 , NaCl, KCl, NaPO 4 , NaCO 3. Place the wire in the flame and observe any change in the flame color. This experiment showed that every metal emits a different color and this proves the hypothesis to be correct, that every metal emits a different color when put into a flame. Flame test lab report conclusion. 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. Light the Bunsen Burner. This would be a huge advance in science if it was possible to tell if people can live on other planets by knowing the elements on the other planets. Partners : Rachel Gideon Joy Boake Hannah Harper Beaker 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. The experiment was conducted by burning a salt and recording the color of the flame. There was copper nitrate, lithium chloride, and calcium chloride for sure because when we tested those compounds separately they showed the colors green, red, and orange which were in the unknown compound. Flame Test Lab Answers It was difficult to identify a couple of the elements that had colors that were similar. 4. FLAME TESTS chemguide. Various Color of Light as the Effect of Electron Emission The color, Premium Flame tests are used to identify the presence of a relatively small number of metal ions in a compound. There are no relevant waste concerns in this lab This experiment will show that every element has a different bright line spectra and this can be used to identify elements in space or anywhere. The spatula was cleaned off to make sure there is no residue on it. In the flame, the metal atoms become excited and produce their characteristic spectrum of . Flame test is a very common test used to identify metals of unknown chemical compound by the color of the flame they give-off when put into a source of flame. Metal When you sit down remove them, Premium 50 mL beaker 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. When theyre heated they gain energy and changed color sometimes. Flame tests are useful means of determining the composition of substances. 1 0 obj % Another purpose is to understand how fireworks work. Quantum mechanics Metal A small amount of sample - or a solution of it in . Safety glasses 2. Based on the results of the flame test, it was evident that the main ions responsible for the In the experiment the different chemicals produced different colored flames ,and the results were read by a spectrometer. When the actual flames were looked at different colors such as red, orange, yellow, gold, blue, and purple were seen. Potassium Nitrate NaCl and NaNo3 both turned the color orange. Elements are only in their excited for a brief moment. Table of Observations Purpose: To observe the colors produced when compounds are introduced into a flame and the electrons become excited. Clearly, and in detail, explain your reasoning. These colors can be put on a bright line spectra which shows every color that the element produces in a flame test.1 Each element has a unique bright line spectra and thus can be identified by using its bright line spectra. Atom compounds. Now that future research has proven that elements can be identified by the color of flame it emits, scientists can now research further on what makes the flame that color. This happens because every metal has a different bright line spectra. The color of the flame corresponds with each element. In this most stable energy state all electrons are in the lowest energy levels available. All alkaline earth metals except beryllium Cathode-ray tube experiments shows called the groups. Sodium chloride |Lithium Chloride, Premium The heat of the flame excites the electrons of the metals ions, causing them to emit visible light. The Procedure, Result, Significance, Conclusion are described in this test. Flame Test Lab. 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. Long hair should be tied up to avoid being singed. Using your data, identify the metal ion in your unknown solution. Excited State: The state in which an atom or molecule picks up outside energy causing the electron to move into a higher-energy orbital. University Our Lady of Fatima University. The chemical may not have been 100% pure or there may have been an inconsistency in the chemical. The colors observed during the flame test result from the excitement of the electrons caused by the increased temperature. Safety & Precautions: The experiment was conducted by burning a salt and recording the color of the flame. Flame test laboratory report objective the experiment conducted aimed to give students the opportunity to determine different metal ions in liquid and solid Skip to document Ask an Expert Sign inRegister Sign inRegister Home Ask an ExpertNew My Library Discovery Institutions University of California Los Angeles Grand Canyon University You can use the flame test to create fireworks. Analysis of this light can be used to identify elements and molecules. Full Document. Data Conclusion 1. What is the relationship between energy, frequency, and wavelength? LiCl This Lab attempted to prove that when electrons are excited and then calm, they emit a color specific to the element. This is once again demonstrated in the results from this practical. Flame test is a very common test used to identify metals of unknown chemical compound Course Hero is not sponsored or endorsed by any college or university. Na2SO4 For Group 1 compounds, flame tests are usually by far the easiest way of identifying which metal you have got. Red has the lowest amount of energy, and violet has the highest. The flame emits a color because each element has an exactly defined emission spectrum which one can use to identify them. Flame Test Lab Also the spectrometer gave different wavelengths for each flame. Introduction Purpose: To observe the colors produced when compounds are introduced into a flame and the electrons become excited. The color of the flame was recorded in table 1. Purpose/Objective: The ground state is the normal electron configuration of atoms or ions in an element. Another purpose is to understand how fireworks work. A flame test is used to identify certain metals in a compound or single element.1 When an electron jumps up to a higher energy state the element is in its excited state. Not all metal ions give flame colours. How would you characterize the flame test with respect to its sensitivity? We will be partaking in the flame test lab at a safe distance from the flames behind your computer screens! 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. Also Thermal excited electron goes from low to high energy level which raises the color but when the excitation ends electron gets to lower level which makes the color back to normal. However, electrons that are excited in a higher energy level are not stable and they tend to go back to their original state. Magnesium did not impart any color change in the flame. Colorful light emissions are applicable to everyday life. Atom, Flame Test Lab Fundamental physics concepts endobj When you place a metal under a. flame, the increased temperature excites it, and it jumps up to a higher energy level. Materials: This procedure was repeated for the other seven salt solutions and the one unknown solution. consequently requires much more energy for its electrons to be excited. Based on the results of your experiments, what metal was found in your unknowns? All compounds containing Na+ cation give off similar flame color which is orange-yellow, compounds that contain K+ cation give off lilac colored flames and compounds that contain Ca2+ cations give off the same flame color which is red-orange. CuCl2 fProcedure: Turn on the Bunsen burner Light a match and place it near the gas output Flame arises Place iron rod-pole in HCI Move it over the flame (this cleans it) Place iron rod-pole in H2O Pick up a substance with the iron rod-pole Place above flame Observe Redo steps 4 through 6 Redo steps 7 onwards (with all substances) Conclusion: Materials: thus identifying the two unknown species in Sample 4. The color of the flame is dependent upon how much energy is being released. Supporter Sodium, Iron: Yellow If your sample has any sodium contamination, the color you observe may include an unexpected contribution from yellow. 1. Chemistry Prentice-Hall: Englewood cliffs, NJ. Also, there is a correlation between the wavelength of a particular element and the color it emits. Hypothesis: When the compound is placed in the flame the flame changes color depending on the chemical compound. The sample and control groups were subjected to analysis by Group 2 of Grade 10-B of P.A.R.E.F. When I went to test it in the flame, I knew right away that it had to be K 2 SO 4 (potassium sulfate), because it emitted violet-orange light, just like the potassium sulfate did in my earlier test. Moisten the wire with water. Every atom has specific orbital energy levels around the nucleus where electrons can be found. in the lab. This lab is made for the learner to determine the identity of two unknown elements. MATERIALS AND METHODS. Please describe below. 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