Determination of Equilibrium Constant Report Sheet

Chemistry 125

 Name  Partner's Name  

Date of ExperimentDate of Report Submission

DATA

Part I: Concentration of FeSCN(2+) stock solution M.

Standard Curve Construction

 Tube #  [FeSCN(2+)]  Absorbance
 1  
 2    
 3    
 4    
 5    

Title your Excel graph - "EquilLastNameFirstInitial" - and put it into the Hand-In folder in your At Ease program.

Part II:

Determination of the Equilibrium Constant for the Iron Thiocyanate Complex System

Fill in the table below with the EQUILIBRIUM concentrations of the system components and find the equilibrium constant, Kc, for each set of conditions.

 tube #

 Abs

[FeSCN(2+)]

at equilibrium

 [Fe(3+)] remaining at equilibrium

 [SCN(1-)] remaining at equilibrium

 Kc

 1      
 2    
 3      
 4        
 5    

The average equilibrium constant, Kc, for the system is .

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