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Apr 27th, 2015
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  1. Part I. You considered the equilibrium: Fe3+(aq) + SCN-(aq) Fe(SCN)2+(aq), and compared the color of the solutions in four test tubes.
  2. In the first test tube, you added 1.0 mL of 0.1 M Fe(NO3)3.
  3. What color change was observed and what did this color change indicate about the shift in equilibrium?
  4. a. The solution turned yellow indicating that the equilbrium shifted to the left increasing [Fe3+] and [SCN-], as well as, decreasing the [Fe(SCN)2+].
  5. b. The solution turned yellow indicating that the equilbrium shifted to the left decreasing [Fe3+] and [SCN-], as well as, increasing the [Fe(SCN)2+].
  6. c. The solution turned deep red indicating that the equilbrium shifted to the right increasing [Fe3+] and [SCN-], as well as, decreasing the [Fe(SCN)2+].
  7. d. The solution turned deep red indicating that the equilbrium shifted to the right decreasing [Fe3+] and [SCN-], as well as, increasing the [Fe(SCN)2+].
  8. e. No color change was observed indicating that equilibrium was unaffected.
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