The four substances HCl, I₂, HI, and Cl₂ are mixed in a reaction vessel and allowed to reach equilibrium in the reaction 2 HCl(g) + I₂(s) ⇌ 2 HI(g) + Cl₂(g). Certain changes (which are specified in the first column in the following table) are then made to this mixture. Considering each change separately, state the effect (increase, decrease, or 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.

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Change (a) add HCl (b) add I₂ (c) remove HI (d) remove Cl₂ (e) add HCl (f) remove HCI (g) add I₂ Quantity amount of HI amount of Cl₂ amount of Cl₂ amount of HCI K amount of 1₂ K