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What is a catalyst?

A substance which increases the rate of a reaction without being consumed

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What is the difference between osmosis and active transport?

In a fish and chips shop, the potatoes are cut hours before they are cooked, but they must not dry out. To stop this, the owner soaks them in a salt solution. Define the process of osmosis and explain what would happen if you used distilled water.

Are diffusion and osmosis the same thing?

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