The figure below shows a small piece of visking tubing which is filled with potassium permanganate solution. Its free ends were tied tightly to prevent leakage .It was then dipped in a beaker full of distilled water. The set up was left for 2 hours .Its was observed that the distilled water was coloured purple.

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The figure below shows a small piece of visking tubing which is filled with potassium permanganate solution. Its free ends were tied tightly to prevent leakage .It was then dipped in a beaker full of distilled water. The set up was left for 2 hours .Its was observed that the distilled water was coloured purple.

The figure below shows a small piece of visking tubing          which is filled with potassium permanganate solution. Its free          ends were tied tightly to prevent leakage .It was then dipped in          a beaker full of distilled water. The set up was left for 2          hours .Its was observed that the distilled water was coloured          purple.

What physiological process was being investigated.(1mk)

Diffusion

Account for the observation made in (a) above.(3mks)

The molecules of potassium permanganate moved from where they were highly concentrated in the visking tubing to the distilled water where they were lowly concentrated through diffusion.

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