Which outcome arises when a positive catalyst is introduced into a chemical reaction at equilibrium changing the speed?

💡 Explanation

When a catalyst is added, the activation energy decreases as it provides an alternate reaction pathway but rate constants increase due to a rate enhancement on forward and reverse reaction, thus, equilibrium concentrations remain unchanged. Therefore, the activation energy decreases maintaining equilibrium, rather than shifting the equilibrium or altering concentrations, because the effective rate increases uniformly.

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