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12 June, 19:34

The rate constant for a certain reaction is k = 6.50*10-3 s-1. If the initial reactant concentration was 0.600 M, what will the concentration be after 3.00 minutes?

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  1. 12 June, 19:57
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    Answer: 1.037M

    Explanation:

    Since the rate constant unit is per seconds, therefore it is a first order reaction.

    First order reaction equation is given as

    InA = - kt + InAo

    Where, Ao is the initial concentration of reactant = 0.600M

    A is the concentration of reactant at a specifies time t=3*60=180s

    and k is the rate constant

    InA = - 6.50*10^-3 * 180 + In (0.6)

    InA = - 1.17 + 0.5108

    InA = - 1.680

    A = e-1.680

    A = 1.037M

    Therefore the concentration after 3minutes is 1.037M
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