Exercise 14.55 Consider the reaction: NiO(s)+CO(g)⇌Ni(s)+CO2(g) Kc=4000.0 at 1500 K When calculating the answer, do not round to the appropriate number of significant figures until the last calculation step.

Question

If a mixture of solid nickel(II) oxide and 0.10000 M carbon monoxide is allowed to come to equilibrium at 1500 K, what will be the equilibrium concentration of CO2?

Nevaeh · Accepted Answer

never mind.. I got 0.10..

DrBob222 · Answer

.......NiO(s)+CO(g)⇌Ni(s)+CO2(g)
I......solid..0.1....solid..0
C......solid...-x....solid..x
E......solid..0.1-x..solid..x

Substitute the E into the Kc expression and solve for x.

Remember that NiO and Ni are NOT included in the Kc expression.

Nevaeh · Answer

I got 0.08, but the answer is wrong!

DrBob222 · Answer

A word to the wise. When you answer a question with JUST an answer you don't help us find the error. ALWAYS show your work of how you obtained that answer so we can go through the math with you. I suspect you either substituted incorrectly or you made a math error.