Conceptual Models > Kinetics and rate controlling factors

simple question about equation used in example 9

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mvida:
Hello!

I had a quick question about the oxidation equation used in example 9:

moles = (2.91e-9 + 1.33e12 * (ACT("OH-"))^2 * p_o2) * Fe_di * TIME

^ what does 1.33e12 represent? If I'm understanding correctly, we have a rate constant k + this 1.33e12 value, and then everything else you need to consider when oxidizing Fe2+. I've read the corresponding paper that was cited for this, but am still confused.

Thank you!

dlparkhurst:
I haven't looked at the paper, but that coefficient is simply part of the expression for the rate of the oxidation reaction. Specifically, it accounts for the variation in rate related to the activity of hydroxide.

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