Question

If 6 litres of hydrogen and 4 litres of chlorine are mixed and exploded and if water is added to the gases formed, find the volume of the residual gas.

August 2, 2024

Answer

H₂	+	Cl₂	→	2HCl
1 vol	:	1 vol		2 vol

To calculate the amount of hydrogen used

Cl₂	:	H₂
1	:	1
4	:	x

⇒ x = $1\over 1$ × 4 = 4 lit

Remaining hydrogen = 6 – 4 = 2 lit.

To calculate the amount of HCl :

Cl₂	:	HCl
1	:	2
4	:	x

⇒ x = $2\over 1$ × 4 = 8 lit

Hence, after reaction 8 lit of HCl is formed which dissolves in water and 2 lit of hydrogen is left.

∴ 2 lits. of hydrogen is left.

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