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Explain the effect of concentration in an equilibrium state? |
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Answer» Solution :At equilibrium, the CONCENTRATION of the reactants and products does not change. The addition of more reactants or products to the reacting system at equilibrium causes an increase in their respective concentration. According to Le-Chatelier.s principle, the effect of increase in concentration of a substance is to SHIFT the equilibrium in a direction that consumes the added substance. For example `H_2(g) + I_(2)(g) hArr 2HI(g)` The addition of `H_2` or `I_2` to the euilibrium mixture, disturbs the equilbrium . In order or minimize the stress, the sytem shifts the reaction in direction where `H_2` and `I_2` are consumed i.e, FORMATION of addition HI would balance the effect of added RECTANT. Hence the euilibrium shifts to the right (forward direction) i.e the equilbrium is re-established. Similarly , removal of HI (Product ) also favours forward reaction.If HI is added to the equilibrium misture, the concentration of HI is incrased and system proceeds in the reverse direction to nullify the effect of increase in CONCENTATION of HI. |
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