Question

Elemental calcium reacts with water at room temperature to form calcium hydroxide and hydrogen gas as shown in this equation. Sodium undergoes a similar reaction with H2O. What would be the coefficient for sodium in a similar reaction?

Answer 1

The answer is 2

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Answer 2

Reaction of Elemental Calcium with Water is as follow,

Ca + 2 H₂O → Ca(OH)₂ + H₂↑

When Sodium Metal is reacted with Water it produces NaOH and eliminates Hydrogen gas as shown in following equation,

2 Na + 2 H₂O → 2 NaOH + H₂↑

In both cases corresponding Hydroxides along with Hydrogen gas is produced.