Different Types of Rate Laws


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Letty Liu 2C
Posts: 105
Joined: Fri Aug 09, 2019 12:16 am

Different Types of Rate Laws

Postby Letty Liu 2C » Tue Mar 10, 2020 11:21 pm

What's the difference between differential and integrated rate laws? When do we have 2k as a constant instead of just k?

Myka G 1l
Posts: 100
Joined: Fri Aug 30, 2019 12:17 am

Re: Different Types of Rate Laws

Postby Myka G 1l » Wed Mar 11, 2020 12:25 am

Differential rate laws describe the change in reactant or product concentrations as a function of time. Integrated rate laws describe the actual concentrations of reactants or products as a function of time. The only 2k I can think of is for the half life equation of a zero order reaction which is [A]o/2k.

805303639
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Re: Different Types of Rate Laws

Postby 805303639 » Thu Mar 12, 2020 8:18 am

Differential rate laws express the instantaneous rate of a reaction as a function of reactant concentrations. Integrated rate laws express the concentration of reactant remaining as a function of time. You'll have 2k as a constant if you solve for the rate of consumption/formation of a particular species with a stoichiometric coefficient of 2. This results from the algebraic rearrangement of d[A]/(a dt) = k [A]^n to d[A]/dt = a*k [A]^n.


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