calcium sinks in water but starts floating on it after some time why
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Answer:
The reaction of calcium with water is not very violent. SO, the heat released is not sufficient for the hydrogen to catch fire. Calcium starts floating because the bubbles of hydrogen gas which are formed during the reaction stick to the surface of the metal and hence caclium floats on water.
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Explanation:
After calcium reacts with water, hydrogen gas is released in the reaction. This bubbles of hydrogen gas stick to the surface of the metal. The buoyancy of the gas bubbles lifts the calcium up. Therefore, calcium floats on water.
The reaction of calcium with water is less violent. However, the heat released is not sufficient for the hydrogen to catch fire.
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