суббота, 23 февраля 2019 г.
Flame Test Lab
Flame Test foot raceing ground Question When a tangled is placed in the ardour of a burner, what happens to the colourise of the flame? Hypothesis When the compound is placed in the flame, the flame changes polish depending on the chemic compound. When theyre heated, they gain energy and changed wile roundtimes. preventative Requirements for this Lab Wear goggles at all times. If you indigence to get rid of them to write in your notebook you may sit at a plug-in in the center of the room. When you sit down remove them and when you stand up put them on. Use aprons. Pull back hair. No loose clothing.Close-toed shoes. NO FOOLING AROUND. It is very important that you DO not mix up the nichrome conducting wire hands. Background Information When chemical compounds be heated, hey gain energy. The electrons in some of these chemicals will jump from their ground resign electron configuration (such as the electron configurations we agree ben drawing for the elements) to high energy levels. As these electrons fall back to their original positions in the atom, they go bad energy. One form of this energy is on the loose(p) energy. This is what you will be retain in this experiment. Materials Nichrome wire wand Test tubes containing piss Test tubes containing 6M hydrochloric vinegarish as needed to clean wire Test tubes containing dogshit sulfate Potassium sulfate Copper nitrate Potassium nitrate strontium nitrate atomic number 20 nitrate Copper chloride Strontium chloride Calcium chloride carbon monoxide gas chloride Sodium chloride Sodium nitrate Sodium sulfate atomic number 56 clroride Calcium nitrate Tirrel burner Matches Goggles Apron Procedure Work in teams of cardinal At each table there are devil samples and two tirrel burners and matches.Start the burner as you watch learned to do and obtain a start blue flame with the inner blue flame. Next take the nichrome wire and place in the flame. Noticed its assumption when it becomes red hot. This is not the color of the flame you are looking for. The flame to observe is the one obtained effective as you place it in the flame. Place the wand in the test tube with the solution of the compound, quickly place it in the flame and observe its color. Write down the color and any observations on the table provided below. Do this no more than three times.Then rinse the wire in the water Heat the wire in the flame until it has no residue from the compound left. If you devote problems ask your teacher. Return the nichrome wire to the water test tube. When this is completed, give-and-take chemical compound setups with you tablemates. Repeat the procedure for each chemical compound. When your table is done with both chemical compounds, pass them both clockwise to the close table. When all chemical setups are complete, the class will discuss which chemical compounds that you would like to observe again.Analysis Each element is made up of several(predicate) atoms. The he at helps the atoms move around and emit different colors of flame. completely certain elements grass be identified by the naked eye. With others, you can identify an element by their colors, or if a surface, by their cruelty and durability. I do not believe it would be effective because some elements might be similar in most ways and have you confused. I think if the wire in this lab became contaminated, the results of the flame would be different.The colors of the flame would not be correct due to the pollution and chemical compound on the wire. All of the flames dont have the same color because each chemical on the wire is different. It has to have a boost to a higher energy level. Once theyve go baxck to their first positions, they emit energy. The color of the flame is caused by the exciting metal ions. They are shown once burned just like we did in class. Copper 1s22s2 2p63s23p64s23d9 , Sodium 1s22s2 2p63s1 , Potassium 1s22s2 2p63s23p64s1 , Strontium 1s22s2 2p63s23p64s23d 104p65s2Flame Test LabI. innovation To observe the colors produced when compounds are introduced into a flame and the electrons become excited. To infer the wavelength of light produced, then calculate the frequency and energy of the light II. Safety Standard safety procedures III. chemical substance Inventory Chemical Name Hazards atomic number 3 Chloride Moderately Toxic by ingestion Potassium Chloride Slightly nephro venomous by ingestion Calcium Chloride Slightly toxic Barium Chloride exceedingly toxic by ingestion.Use extreme caution Cupric Chloride HIGHLY toxic by ingestion. Use extreme caution IV. Pre-Lab Questions V. Procedure 1. Dip the riled wooden splint in one chemical at a time. Make a few crystal stick to the splint 2. hold back the end of the splint with the crystals in the burner flame and watch the first color you see. When it changes to orange, the splint is burning and we dont care about that color 3. Use your chart from your prelab to estimate the wavelength of the color being produced 4. Obtain an vague from your teacher, record the letter of the unknown, and do a flame test on the unknown. It will be one of the chemicals you have already tested. VI. Data and Observations Chemical Color produced Estimated Wavelength (nm) Lithium Chloride Sodium Chloride Potassium Chloride Calcium Chloride Strontium Chloride Barium Chloride Cupric Chloride Unknown___ VII. Calculations For each chemical, do the following calculations. 1. Using the estimated wavelength, calculate the frequency of the light produced. 2. Using the frequency of the light, calculate the energy of each photon of light produced. VI. Conclusion VIII. Error Analysis