Use Le Chatelier's principle to explain the different colors found in the following equilibiria. Show all chemical reactions.Ni 2+, NH3 and Ni(NH3)6 2+Methyl orangeFor our Ni2+ experiment the color started light green/blue, then when added NH3 turned purple/blue, then after adding HCl turned back to light green/blueFor our Methyl orange experiment the solution turned red after adding HCl, turned orange after adding NaOH and turned back to red when added HCl

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Reid WolffLv2

29 Sep 2019

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Hi, can someone help me answer these questions? I promise to rate you!!

1. In Le Chatlier's principle, can you describe the reaction between Fe+3 and SCN- with Fe(SCN)+2. The reaction turned reddish brown when Fe+3 and SCN- were mixed together. Where does the equilibrium shift?

2. In Le Chatlier's principle, can you describe the reaction when 0.1 M Ni(NO3)2 and 6 M of NH3 are mixed together. The color changed from light blue to dark blue. After that we added 6 M HCl, the color changed again to a lighter color. Where does the equilibrium shift?

3. In Le Chatlier's prinicple, can you describe the precipitation that occured when NaOH and Ca(NO3)2 were mixed together? Also, after being centrifuged, the solution and the precipitation solid (white) separated. We threw out the liquid and added HCl and NaOH. Where does the equilibrium shift?

4. In Le Chatlier's prinicple, can you describe the reaction that occured when 5 drops of 0.1 M Co(NO3) is added mixed with 5 drops of concentrated HCl. The color changed into pink. When we added water, the color changed into light pink. Then when we boiled it, it turned blue. After cooling, it turned pink again. Where does the equilibrium shift?

5. We took two test tubes, marking one ACID and one is BASE. We added 3 mL of H2O in each. We added 6 drops of 6 M HCl to the acid tubes and a drop of NaOH to the base tube. Then we added 4 drops of the indicator on each (methyl orange- indicator). The acid tube turned into color pink after the indicator and NaOH again was added. The base tube turned yellow after the indicator and HCl solution is added. In Le, Chatlier's principle, can you describe this whole reaction? Where does the equilibrium shifts?

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Indicators are typically weak acids and the equilibrium can bedescribed as follows:

HInd + H2 H3O⁺ +Ind^- ÎH= -2 kJ/mol

Assume that HInd is red incolor and Ind^- is blue in color.

a) If a solution is purple(equal concentration of the two species), what color will thesolution turn when NaOH or other base is added to the solution?Explain in terms of Le Chatelier's Principle.

b) If a solution is purple(equal concentrations of the two species), what color will thesolution turn when the system is cooled in an ice bath? Explain interms of the Le Chatelier's principle.

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