Question

2Li + H2SO4=Li2SO4 + H2 How many liters of hydrogen gas, H2 at STP can be produced from 3.0 moles of Li? The molar volume of a gas at STP is 22.4L/mol.

Answer 1

volume of
`H_2=33.6 litre`

Step-by-step explanation:

Firstly balance the given chemical equation,

`2Li + H_2SO_4=Li_2SO_4 + H_2`

From the given balance equation it is clearly that,

2 mole of Li gives 1 mole of H2 gas

`2 mole Li`⇔
`1 mole H_2`

`1 mole Li`⇔
`0.5 mole H_2`

`3 mole Li`⇔
`1.5 mole H_2`

hence

3 mole of Li will give 1.5 mole H2 gas

therefore volume of gas produced from 3 mole Li at
`STP = 1.5*22.4 (L)/(mol)`

volume of H2=33.6 litre