Question

1.Write the reaction for the formation of FeNCS^2+
2.Write the equilibrium constant expression for the formation of FeNCS^2+
3.What are the FeNCS^2+ concentrations in solutions 1-6 used for the calibration curve?
4.Calculate the value of Keg from the following equilibrium concentrations: [FeNCS^2+]=1.71x10^-4 M, [Fe^3+]=8.28x10^-4 M, and [SCN-]=4.28x10^-4 M.
5.State the Beer-Lambert law and define all terms in it.
6.Why is a calibration curve constructed? How?
7. Briefly explain the meanings of the following terms as they relate to this experiment (a) reversible reactions, (b) state of dynamic equilibrium, (c) equilibrium constant expression, (d) equilibrium constant.
8.How are percent transmittance and absorbance related algebraically?

Answer 1

most likely, the compelx was formed from iron (III) nitrate and potassium thiocyanate

Answer 2

I don't know what to take from that. A reaction like FeNCS^2+-->iron(III) nitrate and potassium thiocyanate