Multiple choice

Why does increasing concentration increase the rate of a chemical reaction?

  1. Less molecules in area = faster reaction rate

  2. More molecules in area = more chances for collision

  3. Less molecules in area = higher molecule speed

  4. More molecules in area = slow diffusion rate
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Increasing the concentration of reactants means there are more particles in a given volume. This higher density increases the probability and frequency of successful collisions between reactant molecules.

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