(a) What happens when calcium reacts with cold water?

(b) Why does calcium metal starts floating in water after the reaction?

Asked by Topperlearning User | 30th Apr, 2014, 03:24: PM

Expert Answer:

(a) Calcium reacts with cold water to form calcium hydroxide along with evolution of hydrogen gas.

(b) The piece of calcium metal starts floating in water because the bubbles of hydrogen gas formed during the reaction stick to its surface.

Answered by  | 30th Apr, 2014, 05:24: PM