as a 2 CO2 Sample solutions: Test Tvolume T Final Tvolume Final Tvolume m slope

Question

as a 2 CO2 Sample solutions: Test Tvolume T Final Tvolume Final Tvolume m slope concentration of [FescN tube of Molarity of Molarity of of Final Absorbance from Use A m concentration number Fe s of Fe's SCN- HNO, Volume calibration (Equilibrium concentration) 1 5.00 col 1.00 6.000a 400 10.00 0. 2 5.00 0 ODI 2.00 o ocou 300 10.00 1.44 3 500 o oo 300 0.000 200 10.00 2.42 Initial concentration of Fe (aq) is 2.00 x 103M Final concentration of Fe can be calculated using Mivi" Mrvr Initial concentration of SCN-lis 2.00 x 10 3 M Final concentration of SCN l can be calculated using MiVi Mrvr Calculate equlibrium [FeScN21 in test tubes 1-3 numbers Enter the equilibrium concentration of [FescN2 ]in ICE tables (Based on testtube

Explanation / Answer

From the given data,

[SCN-] is the limiting reactant

[FeSCN2+] formed = [SCN-] concentration in solution

Plot, absorbance vs [FeSCN2+]

slope = (2.42 - 1.44)/(0.0002) = 4900 M-1.cm-1

slope remains constant

[FeSCN2+] can be added to the column same as [SCN-] concentration

We need another set of data for the calculation of equilibrium concentration of each species in solution.

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