Eduard-Job-Foundation for Thermo- and Matterdynamics

Experiment 6.1: Iron(III) Thiocyanate Equilibrium

Experiment: Iron(III) Thiocyanate Equilibrium

Procedure:
A pale orange diluted iron thiocyanate solution is treated alternatively with excess iron(III) or excess thiocyanate.

Observation:
The color gets deep red in both cases.

Explanation:
The equilibrium can be described simplifying according to the equation:

formel7.gif

The addition of water shifts the equilibrium in direction of the reactants, the addition of iron(III) or thiocyanate again in direction of the products.

Video (mpg4, 1:37)