Enter Data for solutions in Table D-1

First, indicate the size of the volumetric flask used to make up your solutions. Most will use 25.00 mL volumetric flask. You can change the value for 50.00 mL.

Size of volumetric flask ==> mL

Second indicate the molarity of the NaSCN stock solution.

Molarity of NaSCN stock solution ==> M Solution

Enter Data for solutions in Table D-1
Solution Number	mL of stock NaSCN Solution pipeted	Molarity of NaSCN Solution after dilution	Absorbance
1
2
3
4

Slope of Line
y intercept
Corr Coefficient

Calculation of Concentration of Unknown Solution
Enter the size of the volumentric flask used to make up the unknown solution. Size of volumetric flask ==> mL
Your unknown solution was prepared with mL of unknown.
Absorbance of SCN- solution ==>
Molarity directly off graph ==>
Molarity of NaSCN in the unknown ==>
status ==>

Determiniation of Kc -- from Table 2 Data
Use the Abs. from Solution 2 to find the equilibrium and change in concentration for FeSCN2+. Lines in yellow
Absorbance for Solution 2 ==>
Equilibrium Calculations

Solution 2	[Fe3+]	[SCN-]	[FeSCN2+]
Initial
Change

Equilibrium
Kc

Use the Abs. from Solution 3 to find the equilibrium and change in concentration for FeSCN2+. Lines in yellow
Absorbance for Solution 3 ==>
Equilibrium Calculations

Solution 3	[Fe3+]	[SCN-]	[FeSCN2+]
Initial
Change

Equilibrium
Kc

Average Kc