 We will do a demonstration to illustrate the difference between the thermodynamic control and the kinetic control of the product of a reaction. We will put a .05 molar solution of mercury-2 chloride in a beaker. We will add some .1 molar potassium iodide. We notice the formation of a reddish-iron solid. This solid is the product of thermodynamic control. It is the more stable product. We will now mix dilute solutions of mercury-2 chloride and potassium iodide. We see the formation of a yellow solid. This is the product of kinetic control. It is not the more stable product. Over time, the yellow product will undergo the reverse reaction and then eventually form the more stable product. The solution turns orange.