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13 November, 11:53

Why does a lower concentration of dissolved particles decrease the reaction rate? A. It does not. A high concentration decreases reaction rate. B. When there are less dissolved particles, less collisions take place. C. Concentration is measured inversely. A low concentration indicates a higher portion of dissolved reactant particles. D. The dissolved reactant cannot collide with enough energy to react because it is moving slowly when it is dissolved in a solution.

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  1. 13 November, 11:57
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    Answer: Option (B) is the correct answer.

    Explanation:

    Whenever there is less concentration of solute particles in a solvent then it means less number of solute particles are available. As a result, there will occur less number of collisions between the solvent and solute particles.

    It means that there will be a decrease in rate of reaction.

    But if there is more concentration of solute particles then it shows more number of solute particles are available for reaction. As a result, more number of collisions will take place between the particles of solute and solvent.

    Hence, then there will occur an increase in rate of reaction.

    Thus, we can conclude that a lower concentration of dissolved particles decrease the reaction rate because when there are less dissolved particles, less collisions take place.
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