Q.

Which statement is correct about a system at equilibrium?

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a

The concentrations of reactants must equal the concentrations of the products.

b

The concentrations of reactants and product are not affected by a change in temperature.

c

The concentrations of reactants and products can be changed by adding a catalyst

d

The forward and reverse reactions occur at identical rates.

answer is A.

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Detailed Solution

The forward and backward reactions happen at the same rates. Equivalent reactant and product concentrations are required. The ratio of reactants to products can be changed by using a catalyst. The concentrations of the reactant or product are unaffected by temperature changes.

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