Le Chatelier's principle

IB Chemistry: Le Chatelier's principle

Using a colour change is one of the best ways to demonstrate chemical equilibrium and Le Chatelier"s principle. In fact students will already have met a simple example when they used an acid-base indicator during the titration of an acid with a base although they probably will not have made the connection. I usually demonstrate chemical equilibrium by using a beaker of copper(II) sulfate solution placed on an old overhead...

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