Justify that the reaction : 2Na_((s))+H_(2(g))to2NaH_((s)) is a redox change.

Justify that the reaction : 2Na_((s))+H_(2(g))to2NaH_((s)) is a redox

1.	Justify that the reaction : 2Na_((s))+H_(2(g))to2NaH_((s)) is a redox change.
Answer» SOLUTION :Since in the above reaction the compound formed is an ionic compound, which may also be represented as `Na^(+)N_((s))^(-)`, this suggests that one half reaction in this process is : `2Na_((s))to2Na_((g))^(-)+2E^(-)` and the other half reaction is : `H_(2(g))+2e^(-)to2H_((g))^(-)` This splitting of the reaction under examination into two half reactions automatically reveals that here sodium is oxidised and hydrogen is REDUCED, therefore, the complete reaction is a redox CHANGE.