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StuDocu is not sponsored or endorsed by any college or universityExperiment 34 - exp 43 lab reportGeneral Chemistry II/Lab (Nova Southeastern University)StuDocu is not sponsored or endorsed by any college or universityExperiment 34 - exp 43 lab reportGeneral Chemistry II/Lab (Nova Southeastern University)Downloaded by Ramy Messiah ([email protected])lOMoARcPSD|5383580
Experiment 34: An Equilibrium ConstantData:Table 1: Measurements Used in the Experimental SetupMolar concentration of Fe(NO3)3(M)0.2Molar concentration of NaSCN (M)0.001StandardSolutionsBlank12345Volume ofNaSCN (mL)012345Moles of SCN-(mol)01.00*10-62.00*10-63.00*10-64.00*10-65.00*10-6Downloaded by Ramy Messiah ([email protected])lOMoARcPSD|5383580
[SCN-] (25.0mL)04.00*10-58.00*10-51.2*10-41.6*10-42.00*10-4[FeNCS2+](mol/L)04.00*10-58.00*10-51.2*10-41.6*10-42.00*10-4%T10012.4563.1041.8834.7521.04Absorbance0.095.200.378.459.67700000000.10.20.30.40.50.60.70.8f(x) = 3325 x − 0.03R² = 0.98A vs. [FeNCS2+]Table 2: Absorbance for the Set of Test SolutionsMolar concentration of Fe(NO3)3(M)0.002Molar concentration of NaSCN (M)0.002Test Solutions678910Volume ofFe(NO3)3(mL)55555Moles of Fe3+,initial (mol)1*10-51*10-51*10-51*10-51*10-5Volume ofNaSCN (mL)12345Downloaded by Ramy Messiah ([email protected])lOMoARcPSD|5383580
Moles of SCN-,initial (mol)2*10-64*10-66*10-68*10-61*10-5%T84.9256.8931.8419.3612.11Absorbance.071.245.497.713.917Table 3: Calculations of Kc678910[FeNCS2+], equilibrium, from calibration curve (mol/L)2.15*10-42.47*10-42.79*10-43.46*10-43.88*10-4Moles FeNCS2+at equilibrium (10 mL) (mol)2.15*10-62.47*10-62.79*10-63.46*10-63.88*10-6[Fe3+], equilibriumMoles Fe3+, reacted (mol)2.15*10-6

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