Passage or question givens
For H2 + I2 ⇌ 2HI, the equilibrium concentrations [HI], [H2] and [I2] are 0.4, 0.2 and 0.2 mol/dm³ at a fixed temperature.
Chemistry for the selected science pathway
Model answer and review guidance
4
0.16/0.04=4.
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Chemistry for the selected science pathway
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No. It accelerates both directions without changing the equilibrium constant.
Review both the conclusion and its reason. It accelerates both directions without changing the equilibrium constant.
Chemistry for the selected science pathway
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0.25
10/40=0.25.
Chemistry for the selected science pathway
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The equilibrium constant depends on temperature.
Do not treat K as unchanged under every condition.
Chemistry for the selected science pathway
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The response depends on the change in gas mole counts and the reaction; equal gas mole counts need not shift for this reason.
State the gas-phase condition.
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