Archive
9th of September 2015
Chemistry
Q:

WHY CALCIUM FLOATS IN WATER?

Shubham Chauhan - CBSE - Class X

Wednesday, September 09, 2015 at 18:30:PM

A:

Ca(s) + 2H2O(l) → Ca(OH)2(aq) + H2(g)

The reaction of calcium with water is less 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 calcium floats on water.

Wednesday, September 09, 2015 at 18:35:PM