Question

write balanced equations for the reaction of sodium,potassium and calcium in cold water

Answer 1

Hey mate..

2Na+2H2O-2NaOH+H2
2K+2H2O-2KOH+H2
2Ca+2H2O-Ca(OH)2+H2

HOPE IT HELPS...☺

Answer 2

Answer :

Sodium and potassium reacts violently with cold water whereas calcium reacts readily with cold water and large amount of heat is released.

The balanced chemical equation for the reaction of sodium with cold water will be,

$2Na(s)+2H_2O(l)\rightarrow 2NaOH(aq)+H_2(g)$

The balanced chemical equation for the reaction of potassium with cold water will be,

$2K(s)+2H_2O(l)\rightarrow 2KOH(aq)+H_2(g)$

The balanced chemical equation for the reaction of calcium with cold water will be,

$Ca(s)+2H_2O(l)\rightarrow Ca(OH)_2(aq)+H_2(g)$