At a certain temperature, the equilibrium constant, K c , Kc, for this reaction is 53.3. H 2 ( g ) + I 2 ( g ) − ⇀ ↽ − 2 HI ( g ) K c = 53.3 H2(g)+I2(g)↽−−⇀2HI(g)Kc=53.3 At this temperature, 0.700 mol H 2 0.700 mol H2 and 0.700 mol I 2 0.700 mol I2 were placed in a 1.00 L container to react. What concentration of HI HI is present at equilibrium?

1.099 M is the concentration of HI is present at equilibrium.

Explanation:

Initial concentration of hydrogen gas =

Initial concentration of iodine gas =

Initially

0.700 M     0.700 M         0

(0.700-x)M   (0.700-x)      2x

Expression of an equilibrium constant is given by :

Solving for x:

x = 0.5495 M

Concentration of HI is present at equilibrium:

answers: to make sure that all of the broken pieces of tablet were added to the water, to allow for fair comparison of all three trials, with different particle sizes to avoid experimental error