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Equilibrium Constant-Transition Metal Complex-Keq

I am trying to understand the prelaboratory assignment, Can you make it any simpler than this?
The questions are attached on page 163.

Pre-Laboratory Assignment

Equilibrium constant

1. Write the equation and the equilibrium constant expression for the reaction under study in the experiment
The equation is
Fe3+ SCN- --> FeSCN2+

2. What species is being spectrophotometrically measured?
3. What is the color of the speices?
4. What is a standard curve?
5. Given the following data prepare a Plot of Absorbane Vs [FeSCN2+]
6. What is the [FeSCN2+] at an absorbance of 0.35 from the standard curve?


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