For carbon monoxide poisoning, the treatment is administration of oxygen at high pressure. this increases the amount of oxyhemoglobin in the bloodstream. using le chatelier's principle, completely explain why this treatment is effective.

Adding oxygen will cause the equation of 
CO-Hemogoblin + O2= Hemogoblin = Oxyhemogoblin

to the right. This is because the increase in pressure leads to more on the left side, and as such a balance needs to be maintained so the equation shifts to the right.

I’m not sure what your trying to say here.. can you clarify again?