Chemsitry: Equilibrium Quantities

Question 1

How do we calculate concentration?

Answer 1

moles / volume (dm3)

Question 2

How do we convert from cm3 to dm3?

Answer 2

/1000

Question 3

How do we find equilibrium quantities?

Answer 3

calculate actual number of moles of each species present at equilibrium

Question 4

What is needed to calculate equilibrium moles?

Answer 4

-equation with mole ratio -initial moles -change in moles

Question 5

Using the example CH4 + H2O <—> CO + 3H2, how are equilibrium moles calculated if we know this information:
initial CH4: 1 H2O: 1 CO: 0 3H2: 0
equilibrium moles CO: 0.4

Answer 5

change in moles CH4: -0.4 H2O: -0.4 CO: +0.4 3H2: +1.2 (0.4x3)
equilibrium moles CH4: 0.6 (1-0.4) H2O: 0.6 (1-0.4) CO: 0.4 3H2: 1.2 (0+1.2)