Question

If electrolysis is performed with 100% efficiency on 100 grams of water, how many grams of hydrogen gas will be produced?

Answer 1

11

Step-by-step explanation:

Answer 2

`m = 44.4\,g`

Step-by-step explanation:

The stoichometric formula for the electrolysis is:

`H_(2)O \rightharpoonup 2H_(2) + O_(2)`

One mole of water is dissociated into 2 moles of hydrogen and one mole of oxygen. The mass ratio of hydrogen to water is:

`r = ((2\,mole)\cdot(4\,(g)/(mole) ))/((1\,mole)\cdot (18\,(g)/(mole) ))`

`r = 0.444`

The amount of hydrogen that can be produced at 100 % efficiency is:

`m = (0.444)\cdot (100\,g)`

`m = 44.4\,g`