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Eggshells contain the calcium carbonate, which is a base. It is the same substance found in limestone.

The carbonate (CO32-) ion reacts with acids to form the bicarbonate ion (HCO3-), or carbonic acid (H2CO3), a very weak acid that easily breaks down.

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13y ago
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13y ago

well,egg shells are very high in a substance called CaCO3, otherwise known as Calcium Carbonate which is also a good base. So, if it comes in contact with an acid, it neutralizes it to give,a calcium salt, Carbon dioxide and water.

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Q: How do eggshells neutralize acidic acid?
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