A small crystal of KMnO4 was dropped into the beaker and left for a short time.
The only problem with this experiment is that it is very difficult to quantify the rate of diffusion, so we are going to modify this experiment and use a colorimeter instead.
The better alternative.#
We used a colorimeter with pasco Sparkview software to observe the rate of diffusion.
A small crystal ( just under the cuvette in the picture) was placed into the cuvette and added to the colorimerer which recorded the results.