General Chemistry II Laboratory Manual, 2019 Revision 89 emeiidiliapI ns to Le Chatelier's Principle A highlighter upaup chisel Partner's Name: Part 1-Study of Concentration Effects: Oto Tolo FeCl3 + 3SCN Fe(SCN)3 +3Cl- nocuom conmo sSin Test Effect on Color Tube Ion or Substance Added Effect on [Fe(SCN)3] compared to Control Fea3 turned daixer red Innewed turned buue Fnciedsed black coro Remanid me same It 63 NHy SN 7. It no effect Z 4 Explain what happened in each test tube below based on Le Chatelier's Principle. 5) Addmg teclz merrd the equai bmum to maht srde , fouming more fescu, . edutesl dors oi bebbs an me ammannem mirocy anate shifted the racon to me nght, fom my more recscud,] 6)Add dmg (ontrolgroup" p's 4) mis rebe roembled me It rema mod Crant red. ihe a Pen force d it back to FeCUy Red )eu+MG SCU eeSCA TeescaN +31- +NHyt + 305 lep FescN), 84 Special Considerations: KSCN, BaCl2, and C0CI2 are toxic compounds. Though the solutions we will be before leaving the laboratory. is a skin irritant. Wash any exposed skin thoroughly and quickly. are dilute, care should be exercised in handling these solutions. Wash your hands well Both K2Cr2Oz and K2CrO4 are toxic, strong oxidizers, and known carcinogens. Though the solutions of both compounds used in this lab are dilute, special care should be exercised in handling these compounds. Wash your hands well before leaving the Solutions of HCl and NaOH can cause skin burns or eye irritation. If you get these ol solutions on your skin or in your eyes, wash the affected area with lots of water. laboratory. Procedure: Part 1-Study of Concentration Effects: pnduct see a diff colos. obni Tiroryanie. FeCl3 + 3SCN = Fe(SCN)3 + 3Cl- Get two 50 mŁ beakers. Into each, place about 20 mL of water. Into one, add about 5 drops of 0.5 M FéCl3 solution. Into the second, add about 5 drops of 1 M NH4SCN 5tones ro cqualibmum 7C apony solution. 229318 stresl Mix the contents of these two beakers together. The deep red color you observe is miensp due to the formation of Fe(SCN)3. You may wish to add a little deionized water to TaPthe mixture to lighten the color before proceeding. Get a test tube rack and four test tubes. Divide the mixture into roughly equal parts in the four test tubes. Line the test tubes up in the test tube rack. ege deil Or muinditiopsg ot 19bio 4) The first test tube will be a control. Leave it as is. Into the second test tube, add 10-15 drops of FeCl3 solution. Note any changes you bserve compared to the control on your data sheet. b Into the third test tube, add 10-15 drops of NH4SCN solution. Note any changes you observe compared to the control on your data sheet. 7 Into the fourth test tube, add about 1 mL of saturated NHẠC1 solution. Note any od changes you observe compared to the control on your data sheet. o oulsv 2erl nsrla of niod to ns 2-Ştudy of the Açid/Bashnmar Dependence ofan Equilibrium: 2CrO42"+ 2H* = Cr207²-+ H20 (rgntyellm exam addmore Ht->cringe sar orange san. 1) Get two test tubes and a test tube rack. Into one test tube, add about 2 mL of 0.5 Mg K2Cr2O7 solution. Into the second test tube, add about 2 mL of 0.5 M K2CrO4 solution. Observe the color of each solution and note this on your data sheet. A Add about 15-20 drops of 6 M hydrochloric acid to each test tube. Note and explain any changes you observe on your data sheet. 2it udd base to it CH add cH-> but nas an aftec not present 201, reacts w/ second effet equelin. H4 rd DOxnt aeent reactsinl ors iunci 2,3.9 be esta purt! fabbse.