Lab #4 Pt B.pdf - B Determination of the Equilibrium...

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B. Determination of the Equilibrium ConstantEquilibrium Solutions12345Absorbance 0.21 0.4 0.58 0.73 0.88mL of Fe(NO3)3solution used 10 mL 10 mL 10 mL 10 mL 10 mLMoles of Fe3+ (initial) 3*10-5mol 3*10-5mol 3*10-5mol 3*10-5mol 3*10-5molmL of NaSCNsolution used 2 mL 4 mL 6 mL 8 mL 10 mL Moles of SCN(initial) 6.00*10-6mol 1.2*10-5 mol 1.8*10-5 mol 2.4*10-5 mol 3.0*10-5mol[FeNCS2+] atEquilibrium 5.28*10-5M 1.08*10-4M 1.58*10-4M 2.0*10-4M 2.42*10-4M Moles of FeNCS2+at equilibrium 1.06*10-6mol 2.16*10-6mol 3.16*10-6mol 4.0*10-6mol 4.84*10-6molMoles of Fe3+Consumed 1.06*10-6mol 2.16*10-6mol 3.16*10-6mol 4.0*10-6mol 4.84*10-6molMoles of Fe3+atequilibrium. 1.45*10-3M 1.39*10-3M 1.34 *10-3 M 1.3*10-3M 1.26*10-3M [Fe3+] atEquilibrium 1.45*10-31.39*10-3M 1.34 *10-3 M 1.3*10-3M 1.26*10-3M Moles of SCNConsumed 1.06*10-6mol 2.16*10-6mol 3.16*10-6mol 4.0*10-6mol 4.34*10-6mol Moles of SCNatEquilibrium 4,94*10-6mol 9.84*10-6mol 1.48*10-6

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