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anonymous

  • 4 years ago

if the concentration of reactants are expressed in mol/L and time is expressed in seconds, what are the units for the rate constant K?

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  1. anonymous
    • 4 years ago
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    What is the equation for the rate constant?

  2. anonymous
    • 4 years ago
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    rate = k[a][b]

  3. anonymous
    • 4 years ago
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    with t on the end

  4. anonymous
    • 4 years ago
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    We want to rate to have units of (mole/L)*s right?

  5. anonymous
    • 4 years ago
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    Sorry, we want units of mole/L-s

  6. anonymous
    • 4 years ago
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    Therefore, the rate constant must have units of \(1/s\)

  7. Xishem
    • 4 years ago
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    Assuming the two reactants have reaction orders of 1, the rate constant needs to have units of: \[\frac{M}{s}=k*M*M\]\[\frac{M}{s}=\frac{1}{M*s}*M*M\]\[\frac{M}{s}=\frac{M}{s}\]Therefore, the rate constant must have units of: \[M^{-1}s^{-1}\]

  8. Xishem
    • 4 years ago
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    Or, alternatively \[L·mol^{-1}s^{-1}\]

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