Chemical equilibrium: no net change in the concentration of reactants and products
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 I2 with the titrant is
I2 + 2Na2S2O3 = Na2S4O6 + 2NaI
Data for the experiment are provided in this table.
|Bulb||Initial mass of HI (g)|| Time |
|Volume of titrant (mL)|
In which bulb would you expect the composition of gases to be closest to equilibrium?
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