Year 12s: what will be the first way you research your future options? >>

Equilibrium calculation

I've been given this question:

CO(g) + Cl2(g) <==> COCl2(g)
at start:
1 mole...2 moles.......0 moles
at equilm:
0.5mol.....?.................?

I'm totally stuck. If someone could explain how to work this out I would be veeery grateful!

Reply 1

EierVonSatan

if 0.5 moles of CO reacts then 0.5 moles of Cl2 has reacted leaving 2-0.5 moles of Cl2 - so this means how much COCl2 is formed?

Reply 2

funkytortoise

0.5 moles CO has reacted with 1.5 moles of Cl2 to form 2 moles of COCl2?

Reply 3

funkytortoise

no, wait. to form 1 mole of COCl2 :confused:

Reply 4

EierVonSatan

Sorry I posted that wrong, my bad (fixed). 1.5 moles of Cl2 remains and so 0.5 moles of COCl2 has been formed, this is because there is a 1:1 ratio in the chemical equation - so for every molecule of CO2 reacts - you get one molecule of COCl2 (and lose one molecules of Cl2).