Question

Explain why calcium metal after reacting with h2o starts floating on its surface?write the chemical equatiom for the reaction

Answer 1

Ca+h2o=cao+h2
When ca react with h2o forms calcium oxide and start floting

Answer 2

Calcium starts floating on water because it becomes lighter due to bubbles of hydrogen gas formed stick to the surface of calcium metal. The reaction is:-
Ca(s) + h2o(l) = Ca(OH)2(aq) + H2(g)