Question

Problem 8.2 Justify that the reaction :
2 Na(s) + H2(g)
H2(g) → 2 NaH (s) is a redox
change.
can someone explain this plz.​

Answer 1

Answer:

Explanation:

The reaction indicates the formation of sodium hydride. Hydrides are class of compounds in which oxidation state of hydrogen is -1. If we write oxidation no. of each species we get :

reactionNa(s)H2(g)NaHoxidation state00Na(+1),  H(-1)

all the atoms in their elemental state have 0 oxidation no.Na is converting from 0 to +1 means oxidized and H is converting from 0 to -1 is reduced.

Hence ,it is a redox reaction.