Things required :
- Plastic cup
- Vinegar
- Water
- Small piece of lime stone
How it’s react ?
o
Take a plastic cup. Take half cup of vinegar. (
vinegar is an acid )
o
Place a small piece of lime stone in the cup of
vinegar.
o
Allow it to soak for several days.
o
Remove the lime stone and observe carefully.
Why ?
In
nature when rain water combines with carbon dioxide in air or with carbon
dioxide from decaying organic matter , carbonic acid is produced. When the acid
flows through cracks in limestone, it chemically reacts with the rock forming
dissolved calcium, which is carried away in water.
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