Equilibrium

An equilibrium constant with a large value, e.g. K_eq = 1000, indicates…

• A very fast reaction

• Products are favored at equilibrium

• Reactants are favored at equilibrium

• Nothing useful at all

What are [A] and [B]?

• concentration of reactants
• concentration of products
• energy of reactants
• energy of products

The following reaction :    
SO_{2 (g)} +  NO_{2 (g)} <=> SO_{3 (g)} + NO (g)  
had reached a state of equilibrium, was found to contain  
0.40 mol L^-1 SO₃ , and 0.30 mol L^-1 NO,
0.15 mol L^-1NO₂ , and 0.20 mol L^-1 SO₂.
Calculate the equilibrium constant  for this reaction. 

• 4
• .42
• .25
• 1

If we start with 0.10M CO₂ and H₂, what are the concentrations of the reactants and products at equilibrium given that K_eq=0.640 at 900K?

CO₂ + H₂ --> CO + H₂O

A 0.0093 mol sample of HCl is placed in a 2.00L container at 500K and allowed to begin decomposition. As equilibrium is reached 0.00029 mol of Cl₂ is produced. (a) What are the equilibrium concentrations of all species and (b) what is the K_eq?