The decomposition of HI(g) is represented by the equation
2HI(g) + H2(g) +I2(g)
The following experiment was devised to determine the equilibrium constant of the reaction.
HI(g) is introduced into five identical 400-cm3 glass bulbs, and the five bulbs are maintained at 623 K. The amount of I2 produced over time is measured by opening each bulb and titrating the contents with 0.0150 M Na2S2O3(aq). The reaction of I, with the titrant is
I2+2Na2S2O3 Na2S4O6 +2NaI
Part A
In which bulb would you expect the composition of gases to be closest to equilibrium
bulb 1
bulb 2
bulb 3
bulb 4
bulb 5
Part B
What is the value of K for the decomposition of HI at 623 K?
Express your answer numerically.