The four substances HCI, I_2, HI, and CI_2, are mixed in a reaction vessel and a
ID: 500625 • Letter: T
Question
The four substances HCI, I_2, HI, and CI_2, are mixed in a reaction vessel and allowed to reach equilibrium in the reaction: 2 HCI (g) + I_2(s) 2 HI(g) + CI_2(g) Certain changes (specified in the first column in the following table) are then made to this mixture. Considering each change separately, state the effect (increase, decrease, no change) that the change has on the original equilibrium value of the quantity in the second column (or K, if that is specified). The temperature and volume are constant.Explanation / Answer
2 HCl (g) +I2 (s) = 2 HI (g)+ Cl2 (g)
If HCl is added amount of HI increases (as equilibrium shifts towards the product side)
If I2 is added amount of Cl2 increases (as equilibrium shifts towards the product side)
If HI is removed amount of Cl2 increases (as equilibrium shifts towards the product side)
If Cl2 is removed amount of HCl decreases (as equilibrium shifts towards the product side, so, reactant decreases)
If HCL is added K (equilibrium constant) decreases (as equilibrium constant is directly proportional to the ratio of product : reactants)
If HCl is removed amount of I2 increases (as equilibrium shifts towards the reactant side)
If I2 is added K(equilibrium constant) decreases (as equilibrium constant is directly proportional to the ratio of product : reactants)
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