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20 August, 19:26

The reaction A + 2B → products has been found to have the rate law, rate = k[A][B]2. While holding the concentration of A constant, the concentration of B is tripled. Predict by what factor the rate of reaction increases

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  1. 20 August, 22:24
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    9 times

    Explanation:

    A + 2B → products

    rate = k[A][B]2

    While holding the concentration of A constant, the concentration of B is tripled. Predict by what factor the rate of reaction increases.

    We can achieve this by given the concentration dummy values.

    Assuming the following values (Any number works, or letters);

    concentration of A = 1

    Concentration of B = 2

    rate = k[A][B]2

    rate = k (1) * (2) ^2

    rate = k 4 ... i

    When Conc of B is tripled;

    Concentration of B = 3 * 2 = 6

    rate = k[A][B]2

    rate = k (1) * (6) ^2

    rate = k 36 ... ii

    Comparing both rates;

    The ratio is 36: 4, upon simplifying = 9 : 1

    This means the factor increases by 9 times
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