Table 1: Calibration Curve Data (4 pts elan Total V Table 2: Calibration Curve a
ID: 493119 • Letter: T
Question
Table 1: Calibration Curve Data (4 pts elan Total V Table 2: Calibration Curve and Pereent Transmittance Recorded for each blank in first four colum l for each blank in final column Absorption Tube Initial Molarity Initial Molarity Final Molarity Transmittance Fe(SCN? Fe(NO3) Table 3 Initial Data for Equilibrium Constant Determination pts total) Volume of Volume of 0.500M Total Vol. Tube Vol. of 0.00200M HNO3 0,00200M KSCN Fe(NOy) Table 4: Calculations for Equilibrium Constant Determination and Transmittance Recorded: pt. for each four columns, 2 pt. for each blank in fnal column) Initial Concentrations Equilibrium Results Tube Initial Molarity Initial Molarity Percent Transmittance Absorption "Equilibrium Fe(NO) KSCN observed Calculated Molarity FescN 4 ,00 Calculated from the equation of the best fit line.Explanation / Answer
moles of Fe(NO3)3 added in tube 1 : 0.02 M * 0.005 L = 1*10^-4 moles
Moles of NaSCN added in tube 2 : 0.002 M * 0.0005L =1*10^-6
As SCN^- is present in smaller amount , this id=s the limiting reagent in this reaction .
moles of Fe(SCN)^2+ formed = 1*10^-6 moles
Molarity = 1*10^-6 *1000/20mL =5*10^-5 M
Thus whatever value you have written for SCN^- , concentration of Fe(SCN)2^- will have the similar concentration.
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