Question

How (Na)+ (H20) -> (NaOH) + (H2)? I mean if one atom of hydrogen is used from H2O for NaOH then how H'2' is evolved and not H(g)?​

Answer 1

Explanation:

You have to count the number of atoms in both sides of the reaction to be equal, to make it a little easier you can make a list. So in the equation

N

a

+

H

2

O

→

N

a

O

H

+

H

2

, there are

1

−

N

a

−

1

2

−

H

−

3

1

−

O

−

1

So you multiply NaOH and H2O by 2, so you have 4 hydrogens in both sides, and then multiply Na by 2 to be equal to the NaOH you previously multiplied.