Question

what happens when calcium is treated with water ??​

Answer 1

Answer:

Reaction of calcium metal with water - When calcium metal reacts with water, it reacts less violently. It produces a hydroxide known as calcium hydroxide (a cloudy white precipitate), and the bubbles of hydrogen gas produced are stuck to the surface of calcium. Due to which it floats over the water surface

Explanation:

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Answer 2

In general, metals form a metal oxide and hydrogen gas and this metal oxide when soluble in water dissolve further forming a metal hydroxide. But some metals form metal hydroxide directly.

In the case of calcium, the reaction with water is less violent and hydrogen starts floating on water and bubbles of hydrogen gas will stick to the metal surface.

Ca + 2H^2O → Ca(OH)^2 + H^2