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← ScienceWhich outcome occurs when a catalyst concentration decreases significantly in a balanced reaction?
A)Reaction reaches equilibrium more slowly✓
B)Activation energy barrier is lowered
C)Equilibrium shifts towards products
D)Overall reaction enthalpy increases
💡 Explanation
Reduced catalyst availability lowers the number of successful collisions achieving the transition state (catalysis), because lower concentrations proportionally decrease effective reaction rates. Therefore, equilibrium is approached more slowly, rather than equilibrium is shifted or enthalpy changed which are energetic concerns.
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