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Consider system at equilibrium:

2CO(g) + O2(g) -> 2CO2(g)

How will increasing the concentration of CO2 shift the equilibrium?
1. to the left
2. No effect
3. to the right

1 answer

According to Le Chatelier's principle, if a system at equilibrium is disturbed by changing the concentration of one of the reactants or products, the equilibrium will shift in a direction that counteracts the change.

In this case, if you increase the concentration of CO2 (a product of the reaction), the system will respond by shifting the equilibrium to the left to reduce the concentration of CO2.

Therefore, the answer is:

  1. to the left