Problem: The decomposition of HI(g) is represented by the equation2HI(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 isI2 + 2Na2S2O3 = Na2S4O6 + 2NaIData for the experiment are provided in this table. Bulb Initial mass of HI (g) Time (hours) Volume of titrant (mL) 1 0.300 2 20.96 2 0.320 4 27.90 3 0.315 12 32.31 4 0.406 20 41.50 5 0.280 40 28.68In which bulb would you expect the composition of gases to be closest to equilibrium?
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FREE Expert Solution
Chemical equilibrium: no net change in the concentration of reactants and products
Problem Details
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 (hours) | Volume of titrant (mL) |
| 1 | 0.300 | 2 | 20.96 |
| 2 | 0.320 | 4 | 27.90 |
| 3 | 0.315 | 12 | 32.31 |
| 4 | 0.406 | 20 | 41.50 |
| 5 | 0.280 | 40 | 28.68 |
In which bulb would you expect the composition of gases to be closest to equilibrium?