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Chemical Kinetics Concentration-Time Curve and Reaction Rate

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During a reaction, the concentration–time curve initially changes rapidly but becomes nearly horizontal after a long time. In this nearly horizontal region, the concentration changes very little with time. What does this indicate?

Verified Answer & Explanation⌄

Correct Answer: C) Reaction rate is approximately zero

Concept Explanation

Reaction rate is related to the slope of the concentration–time curve. A nearly horizontal curve has almost zero slope, so the reaction rate is approximately zero.

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