Lab Flame Test Answers

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• [FREE] Lab Flame Test Answers

  Are these colors a characteristic of the metal? In this virtual investigation you will burn a small amount of various metal salt solutions and record the colors of the flames. From your results, you will draw conclusions about the colors released...

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• [DOWNLOAD] Lab Flame Test Answers | updated!

  Visit [www. More Curriculum Like This Laser Types and Uses Through two classroom demos, students are introduced to the basic properties of lasers through various mediums. Students will gain an understanding of how light can be absorbed and...

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• Flame Test Lab Report

  We will also practice the important skill of making solutions of the correct molarity. Remember, engineers cannot begin designing solutions before researching the concepts surrounding a problem, which is an early stage of the engineering design process. So, in this activity we will be researching. 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 photons of light, they return to their ground states. The amount of energy in the photon determines its color; red for the lowest energy visible light, increasing energy through the rainbow of orange, yellow, green, blue, indigo and violet for the highest energy visible light.

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• Chemistry Lab Flame Tests

  Photons outside the visible spectrum may also be emitted, but we cannot see them. Remember that ultraviolet follows violet as the spectrum increases in energy. Chemical engineers use this low-tech and very reliable flame test to identify an element based on the color it emits when placed in a flame. The arrangement of electrons in an atom determines the sizes of the quantum jumps, and thus the energy and colors of photons emitted. In this lab, we will prepare. We will test the solutions to identify the distinct color each metal ion produces when placed in a Bunsen burner flame.

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• 8: Flame Tests Of Metal Cations (Experiment)

  Then we will calculate the approximate frequency and energy of each wavelength of visible light. With what we learn from this collected data, we will identify the metal in a solution of unknown identity. Either print color copies one per group or display in the classroom the Figure 1 color scale to help students identify wavelengths based on flame color. Figure 1. The visible light spectrum and corresponding colors-to-wavelengths in nanometers nm. Just before the activity begins, pour out the water and rinse the splints with clean water. Choose one of the three chemicals to use for the "unknown solution.

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• Flame Test Lab Conclusion

  Label the beaker with masking tape and a marker as "unknown solution. With the Students Hand out the worksheets and give students a few minutes to answer the pre-lab questions also listed in the Assessment section, with answers , which includes their calculations of how much of three chemicals are needed to make three specific molarity solutions for the lab. Divide the class into groups of two or three students each.

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• Flame Test Quantitative Analysis Pivot Answers

  Have each group prepare the ml each of. Add one of the chemicals such as the strontium chloride little by little using a clean spoon until the mass shown by the electronic balance is equal to the mass, in grams, of the chemical needed, calculated in question 4 of the worksheet pre-lab questions. Lift up the paper carefully with the appropriate quantity of the chemical and pour the chemical into a clean ml beaker. Use the graduated cylinder to measure ml of distilled water and add the water to the ml beaker. Stir the beaker contents with the spoon used earlier to add the chemical to the electronic balance. Label the beaker by placing a piece of masking tape on the beaker and using a marker to write the name of the chemical used to make the solution.

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• High School Flame Test Lab Answers

  Discard the spoon and paper. Do not reuse them when making the other chemical solutions because they will contaminate the solutions. Repeat these steps to make solutions with the two remaining chemicals. Let two wooden splints soak in each solution for 10 minutes. Suggested procedure: Have each group make one solution at a time, then add the wooden splint to the solution, and then make the next solution while the splint soaks. Light the Bunsen burner with a lit match and adjust it to produce a moderately sized flame. Place the soaked end of the wooden splint into the hottest part of the Bunsen burner flame the top of the inner cone.

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• Flame Tests

  Record the observed flame color. Determine the approximate wavelength of the visible light corresponding with each observed flame color. Have students refer to Figure 1 to identify the wavelength based on the flame color. Remind students that the unit of length for wavelengths is nanometers nm. Place a wooden splint soaked with the unknown solution in the Bunsen burner flame. Record the color and identify the metal ion in the solution, based on previous data collection results. Have students write a lab report that includes the five criteria listed on the worksheet, and explained in the Assessments section with answers. Review their worksheet answers to gauge their comprehension. List the electromagnetic spectrum from lowest to highest energy. Answer: Radio waves, microwaves, infrared radiation, visible light, ultraviolet radiation, x-rays, gamma rays. Of visible light, what color is lowest in energy? What is highest? Answer: Lowest energy of visible light is red; highest energy of visible light is violet.

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• Flame Tests Lab

  List all the cations and anions with charges present in this lab. Perform the appropriate calculations for preparation of the three solutions: ml of. Answer: In order to prepare the solutions, students must determine how many grams of each compound must be added to ml of distilled water to create the appropriate molarity solution. Refer to Figure 2 for the answer.

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• Flame Test Atomic Emission And Electron Energy Levels Lab Answers

  Figure 2. The molarity calculations for making the experimental solutions. Activity Embedded Assessment Experiment Conclusions: As directed in the Flame Test Worksheet , have students write typed lab reports that include the following information. If students do not finish within the class period, have them complete the assignment as homework to submit the following class period. Review their answers to assess their comprehension. Is it the metal or the non-metal that produces the flame test color? What brought you to this conclusion? Answer: Flame tests show the color of the metal, or the positive ion [cation] in the chemical solution. Expect students to be able to come to this realization because the three chemicals had different metal atoms, but they all had the same non-metal anion, chloride. The identity of the unknown it is one of the metals you tested The answer depends on which chemical the teacher chose to use for the "unknown solution. Calculations shown in Figure 2.

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• Flame Test Lab: HELP!?

  Calculate the approximate frequency of energy given off by the emitting element in each of the three solutions. Answers: Students should first estimate the wavelength of light produced when each solution burns, based on comparing the color of the flame to an image of the visible light spectrum, such as Figure 1. Expect students to approximate the following wavelengths: for strontium chloride: around nm; for copper II chloride: around nm; and potassium chloride: around nm.

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• Flame Test – Flame Test Lab Report Answers

  How does the flame test investigation relate to the engineering design process? Answer: The flame test is part of the research phase of the engineering design process, which is important so that engineers understand all of the science and math involved in the problem they are trying to solve. Post-Activity Assessment Going Further: As directed in the Flame Test Worksheet , have students answer the following problem on a separate sheet of paper: The energy you observed was given off in the visible light range. Where is ultraviolet light on the electromagnetic spectrum? Does it still contain energy even though it is not in the visible light range?

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• Flame Test Virtual Lab

  Support your answer. Answer: Ultraviolet light is next to violet visible light on the electromagnetic spectrum. This means that it has a smaller wavelength than violet light, a higher frequency, and thus contains more energy than violet light, as well as all other colors of visible light. Safety Issues The lab work in this activity requires the use of Bunsen burners, and thus open flames.

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• Flame Test Lab: HELP!? | Yahoo Answers

  School and class policies vary on the use of open flames. Adjust the procedures accordingly, for example, if only adults are permitted to work with open flames. Some of the chemicals can cause skin and eye irritation, and are hazardous if ingested. Have students wear safety goggles, lab coats and gloves while conducting the activity.

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• Flame Test - JavaLab

  Nitrate solutions of sodium, potassium, lithium, calcium, strontium, barium, and copper. What will the students be doing? Students will carry out this classic chemistry lab by placing metallic ions into a Bunsen burner flame to see the characteristic colors emitted by each metallic ion. Students will develop a reference table of the colors emitted by 7 metallic ions: Sodium, potassium, lithium, calcium, strontium, barium, and copper. Students will use their reference table to identify unknown solutions of ions. Students will use cobalt glass as a tool for identifying the components of a metallic salt mixture. Students will evaluate the usefulness of using this method of metal identification. Students will answer 7 analysis questions to complete the lab. This lab reviews and reinforces the concepts of electrons, electron configurations, energy levels of electrons, excited states, ground states, and the visible spectrum.

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• Amy Brown Science: Flame Tests: A Favorite Chemistry Lab

  What is included in this product? Editable lab handouts that are ready to be printed and passed out to your students. Complete instructions. Everything you need for the successful completion of this lab. Related resources include the following:.

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• Flame Test Lab Conclusion - Words | Cram

  This flame test lab is always a favorite of mine, and a much loved lab by all of my students. The best time to use this lab is when teaching the following concepts: atomic structure, electron configurations, energy levels, ground state and excited state. Background: A flame test is used to detect the presence of certain metal ions.

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• Flame Test Lab Report By Jodeci Mitchell

  The test involves heating a sample of the element and observing the resulting color of the flame. When atoms of elements are heated to high temperatures, some electrons may absorb enough energy to allow them to move to higher energy levels. The element is then said to be in the "excited state". This excited atom is unstable, and the electrons quickly return back to their positions of lower energy or their ground state. As the electrons return to their ground state, the energy that was absorbed is given off in the form of visible light.

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• Flame Test Lab Worksheet

  The color of this light can be used to identify the elements involved. In a flame test, the element will give off a characteristic color that serves as a simple method of identification of that element. Purpose: To observe the characteristic colors produced by metallic ions when heated in a flame. To identify an unknown metallic ion by means of its flame test. To identify the components of a mixture using cobalt glass. Tips and Suggestions: I like to set up different lab stations and have the students rotate through the stations. I set up stations for the 7 different metal ions that I will have the students test. Students are required to rotate through these 7 stations first. After the students have identified the colors of the above 7 metal ions, I assign an unknown for them to identify. Finally, I have the students use cobalt glass to identify the components of a mixture. I have used metal inoculating loops as a means of heating the metal ion sample, but I prefer to use wood splints.

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• 8: Flame Tests Of Metal Cations (Experiment) - Chemistry LibreTexts

  They are cheap and disposable. Be sure to soak them in the metal nitrate solutions prior to the start of the lab. I set up individual lab stations for each metal ion and have students rotate through the stations. This is a quick and easy way to set up the lab. In a flame test, the element will give off a characteristic color. It is difficult to catch on camera, but the below photos show the characteristic colors of barium lime green and lithium crimson. After students have observed all colors, I assign them an unknown element to identify. Using cobalt glass, students determine the identity of elements in a mixture. When viewing the flame test with the naked eye, the student will see the yellow color of sodium. When viewing the flame test while looking through the cobalt glass the student will see the violet color of potassium.

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