Flame test lab and the electromagnetic spectrum lesson. Jordan anthony, zack balog, and evan degraw regents chemistry class, union springs high school, 4th period january 192015 the purpose of this lab was to see what colors are characteristic of particular metallic ions in a flame test and use their characteristic color to identify other elements. Fill a 250ml beaker halfway full of tap water to use as a. The situation there are several types of ionic compounds.
One of the samples was put on the spatula and the formula of the salt solution was recorded into table 1. Atomic emission is utilized in everyday life in the laboratories of doctors and scientists. The secondary purpose of the lab was to identify unknown compounds that we would test and then guess as to what they were. Every element has a signature emission spectrum that can be used to differentiate between one element and another. Explain how light is released in the form of color using the bohr model. Sodium, in particular, is present in most compounds and will color the flame. Flame tests lab report free essay example studymoose. Emission spectrums are produced from the release of light by electrons in varying energy. It helps to dim the lights in your lab so the colors are easier to see.
This report is a presentation of results of a surface flammability test on a material submitted by the client identified above. Place a small scoopful of each metallic solid in corresponding weighing dish. What is the energy content, in joules, of this photon. In your report you will also need to incorporate the rerun format after.
The different colors of flames are produced by electrons moving from a higher to a lower. Test the solutions the same way you did above and record your observations in table 2 on the report sheet. The solution will be burned and we will make observations about the color of the flame. Have students individually answer the following questions, which are provided on the flame test worksheet. Have students write a lab report that includes the five criteria listed on the worksheet, and explained in the assessments section with answers. We think critical thinker was the eslr in this activity beacuase, we had to think about our unknown element. For example, sodium makes the flame turn bright orange this is the same orange color made by sodium street lamps and many fireworks. The characteristic colors observed are due to emitted electromagnetic radiation from the excited metal cations. By placing atoms of a metal into a flame, electrons can be induced to absorb energy and jump to an excited energy state.
Show the calculations for the preparation of the three solutions. 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. In this lab you will be given six unknown samples of metal. This taught us how the light is emitted, how each compound reacts differently, and the observations we made. Its purpose is to identify specific elements in a material. You can add small amounts of distilled water to the test tube if needed using the squirt bottles in your bin. Flame test lab after performing this lab, we were able to determine the wavelength and the energy change in electrons by observing the color of flame emitted by burning the different metals contained in different metallic salts. The flame test lab was an inclass lab where we tested chemicals in the flames to see the wide range of colors in the color spectrum. In this lab, you will perform flame tests of several different metal cations. Overview students will use small samples of 6 chloride salts of different metals. Includes reproducible student handouts, complete teacher notes with sample data, answers to questions and ideas for extensions plus all materials needed to.
How can atomic absorption and emission spectroscopy be used to identify various metal ions. Type up a formal lab report for the flame test lab, including the following. Finally, answer the questions and perform the exercises as indicated on your report form. The flame test is used to visually determine the identity of an unknown metal or metalloid ion based on the characteristic color the salt turns the flame of a bunsen burner. Keep going until you have recorded the color of al of the known solutions. Based on this information, please make notes for use in your lab report. A flame test performed on an unknown element emits a photon of light with a wavelength of 459 nm. The flame test lab showed us how different compounds react to heat and energy and what lights they emit. The purpose of the experiment was to find what metallic element best represented the tums tablet. What does the law of conservation of energy have to do with this type of experiment. State the most important safety concern in this lab and the required precaution you took. Some compounds do not change the color of the flame. Describe the process taking place within an atom that leads to the emission of light. Back in the 18th century, chemists began using flame tests to identify and distinguish elements.
They then return to their ground state by emitting a photon of light the law of conservation of energy indicates that the photon emitted will contain. Brother hll0cdn lab test report buyer l ab buyer l ab 6 2015 buyers laboratory llc. The heat of the flame excites the electrons of the metals ions, causing them to emit visible light. The students identified the compound but did not understand that the test was a property of the metal atom. Light the bunsen burner, purpose conclusion the purpose of this lab was to develop an activity series of the elements and to view the spectrum. Each one will be dissolved in a small amount of methanol. The purpose of the lab is to observe the characteristic colors produced by certain metallic ions when vaporized in a flame. These they will place into a flame in order to observe the colors produced.
The spatula was cleaned off to make sure there is no residue on it. The flame test is quite a straight forward test, which gives an idea of the cations positive ions present in the compounds. Dip the end of the dry qtip directly in the liquid metal chloride sample. New and improved flame tests demonstration rainbow. Test the remaining samples in the same way, each with its own wire loop. This procedure was done by conducting the flame test. The flame spread index is defined in astm e 176 as a.
Enough distilled water should have been added to make thick slurry in your test tube. Normally this lab was done by have the students test 4 or 5 known substances then identify one unknown. Flame test kit student laboratory kit introduction just as a fingerprint is unique to each person, the color of light emitted by metals heated in a flame is unique to each metal. On average, my class averages on the test on this unit went up 8 points by adding this activity. 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 its heated. Flammability of nonmetallic materials small burner test, 45 determination of the resistance of material to flame. Betterlessons unique formula allows us to bring you highquality coaching, a professional learning lab, and a learnbydoing process that embeds pd into the classroom. You will measure wavelengths of each sample and then use the speed of light equation to determine the unknown chemical. Ensure lab bench is clear of flammable materials solvents, papers, etc. Light the flame and place the boric acidcovered popsicle stick into the flame. Shironakaflame testlab report by nick shironaka on prezi. In this laboratory activity, the characteristic color of light emitted for calcium, copper, lithium, potassium, sodium, and strontium will be observed. The purpose of this lab is to experimentally observe flame tests for several elemental cations.
Be creative when describing the colors, for example use nail polish or crayola crayon names. Flame test lab objective in this lab students will learn about atomic energy levels, emission spectroscopy, and flame tests for element identification. We then determine the identity of two unknowns via flame test. Potassium and sodium will be detected using a flame test, and ammonium ion will be identified. When metal salts ionic compounds are heated in a bunsen burner flame, the metal gives off a characteristic color. Dip the end of the qtip or wood splint in the distilled water and then touch the soaked end to the surface of one of the metal chlorides so that a few crystals of the metal stick to the end.
The purpose of this lab was to allow us to observe compounds and how they react to an energy in different ways. Based on our chemistry classes there are two ways of getting the atoms excited. At specified intervals, a small flame is passed over the sample. Impurities or contaminants affect the test results. We test several chloride salts for their flame test colors.
Duplication in any manner is illegal and strictly forbidden without written permission from buyers laboratory. To conduct a ame test, a clean wire loop or a wooden splint that has been soaked in distilled water is dipped into a powder or solution and then placed into the hoest portion of a ame see figure lll. Sometimes a blue glass is used to filter out the yellow of sodium. Different elements produce different colored flames when placed in the fire of a bunsen burner. Chemistry lab flame tests denton independent school. Dec 27, 2017 flame test lab report 27 dec, 2017 free essays, lab report 0 laboratory activity flame test summary the purpose of this lab was to see how different compounds can change color while in a flame and with this color, i can identify the compound. Incorporate the optional data analysis section and extensions to challenge your higher level students. Laboratory activity flame test summary the purpose of this lab was to see how different compounds can change color while in a flame and with this color, i can identify the compound. This activity is called a flame test and its a real procedure used in labs. Your instructor will provide test tubes containing the salts that you need.
The green color denotes the presence of the element boron b. The test involve putting sample element and see what color appears. When the boric acid was in the flame, you probably notice a bright green portion of the flame. The bunsen burner was set up and the flame was adjusted to the desired height. Students assessment will be based on the completion and accuracy of parts 14, as well as formal lab report using the provided outline and rubric title. You could readily identify the elements that had obvious colors different form all the others such as copper that gave off a bluegreen color and lithium that gave off a bright red color. Is it the metal or the nonmetal that produces the flame test color. Abstractin the flame test lab, the flame test was performed to excite the electrons in the samples and observe the color of the flame. Flame test lab report flame tests lab report chemistry. Oct 10, 2012 we test several chloride salts for their flame test colors.
Flame test lab and the electromagnetic spectrum lesson plan, student version, teacher version and supplemental materials topic. Ion flame test inquiry lab household materials by dunigan. It was difficult to identify a couple of the elements that had colors that were similar. Dip a wooden splint into the slurry then insert it into the flame. However, in order to complete this lab you will need to understand several mathematical equations and vocabulary.
A flame test uses the concept of electron excitation to identify an element. Purpose to observe the characteristic colors produced by certain metallic ions when vaporized in a flame. Review of health history, lab orders and accurate interpretation of lab results, functional blood chemistry analysis, health coaching, diagnostic nutrition assessments with recommendations, and comprehensive lifestyle plans for your individual physiology. The identification of an unknown will also be performed by means of its own flame test. View the color change in the flame and note it in the data table. After several tests for each solution it was determined that the accepted values for each solution, in order, were. The flame emits a color because each element has an exactly defined emission spectrum, which one can use to identify them. This enlightening activity then motivates them to work through the mathematics and makes the metallic ion version of the flame testing lab later in the unit even better. Flame test colorful elements experiments steve spangler. The flame test was used to visually determine the identity of an unknown metal based on the characteristic color the salt turns a flame. This lab is designed much like a boxed microchem lab.
Record the color of the flame when the wire loop first enters the flame. Write a lab report with the following information included. The identity of the unknown metal it is one of the metals you tested. After reading the two articles provided, write a report that addresses the question l1. You may have seen it only briefly but it was there. Flame test lab report salt chemistry metals free 30day trial. The flame test is a qualitative test used in chemistry to help determine the identity or possible identity of a metal or metalloid ion found in an ionic compound. The test cannot differentiate between all elements. Flame tests are many students favorite lab in chemistry because the colors are so vivid and distinct.
Paula owens, ms, ccn holistic and clinical nutritionist, integrative and functional health practioner website. Flame test lab what students are saying as a current student on this bumpy collegiate pathway, i stumbled upon course hero, where i can find study resources for nearly all my courses, get online help from tutors 247, and even share my old projects, papers, and lecture notes with other students. The basic lab activity is ideal for physical science and introductory chemistry. These individuals use the spectrum to test for the presence of elements such as sodium, potassium, iron, etc the color that the unknown solution emits will determine what element the solution could posssibly be. Students should be closely supervised when performing. We think the eslr that was addressed in the activity was critical thinker. In this flame test experiment, seven different known solutions and three different unknown solutions were tested in a burner. In an effort to improve student understanding of ehf and to inspire them to understand that electrons returning to a lower shell emit energy in quantized units, i open the topic of light which is pretty early in the course, now with an ion flame test inquiry lab using ordinary household.
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