An investigation of osmosis – Learning resource

Crossing membranes - An investigation of osmosis

In this investigation you will examine the movement of water across a semi-permeable membrane and also develop your skills in constructing a hypothesis and a method. The investigation and following activities can be completed at school or at home using readily available materials.

Step 1: Soak 3 eggs in vinegar to remove the calcium carbonate shell

- Fill 3 beakers or cups with vinegar and place an egg in each.

- Place a plastic cup or beaker containing water over each egg to keep the egg submerged in the vinegar.

- Do not pick any shell off.

- It may take a few days to remove the shells depending on the strength of the vinegar.

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