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exp8postlab - Determination of an Equilibirum Constant...

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Determination of an Equilibirum Constant Excel Template Chem1310 Laboratory Copyright (c) 2003 Tatsuya Maehigashi Post Lab - Exp. 8 Determining an Equilibrium Constant 30 pts Useful Units Tabulated Data 0 ID Total (ml) 0.00010 0.5 1 1.0 5.0 4.0 10.0 0.000010 0.050 0.10 2 2.0 5.0 3.0 10.0 0.000020 0.149 3 3.0 5.0 2.0 10.0 0.000030 0.276 4 4.0 5.0 1.0 10.0 0.000040 0.375 5 5.0 5.0 0.0 10.0 0.000050 0.448 Tabulated Results 10220.00 Intercept -4.7E-02 Part A. Determining ε b from Beer's Law Plot [Fe(NO 3 ) 3 ] Stock (M) Fe 3+ (ml) SCN - (ml) HNO 3 (ml) [Fe ( SCN ) 2+ ] (M) Abs. 470 [Fe(NO 3 ) 3 ] Diluted (M) [KSCN] Stock (M) [HNO 3 ] Stock (M) Slope = ε b (l/mole) Supporting Calculation (5pts for each) [Fe 3+ ] working [Fe 3+ ] test tube 1 5pts for total fill 5 pts Plot - 10pts Watch out for followings. - Title, X/Y axis labeling (with units where necessary) - Overall appearance of the plot Plot of Absorbance (y-axis) vs Concentration of Iron Thiocyanate (X-axis) 0.00E+001.00E-05 2.00E-05 3.00E-05 4.00E-05 5.00E-05 6.00E-05 0.000 0.050 0.100 0.150 0.200 0.250 0.300 0.350 0.400 0.450 0.500 f(x) = 10220x - 0.05 R² = 0.99 Absorbance vs. Concentration [Fe(SCN)2+] (M) Abs470
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Determination of an Equilibirum Constant Excel Template Chem1310 Laboratory Copyright (c) 2003 Tatsuya Maehigashi PART B. Determining the Equilibrium Constant, K 35 pts Useful Units 0 0 0.10 Tabulated Data/Results ID K 6 1.0 1.0 5.0 7.0 0.123
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