Summing reactions/rate constants

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To determine the rate constant for the overall reaction A + 2B -> D + E + F, it is essential to consider the individual rate constants of the known reactions A + B -> C + D and C + B -> E + F. The discussion emphasizes the need for additional information regarding the lability and stability of the reactants and products involved. It is noted that all species from the first two reactions are stable and that the reactions should be treated as occurring in an open system where they are not reversible. However, the participant expresses confusion about how to apply this information to calculate the rate constant for the combined reaction.
Sosi
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Hi!

I have a couple of reactions whose rate constants are known:

A + B -> C + D (reaction 1)
C + B -> E + F (reaction 2)

and I want to know the rate constants of the sum of these reactions. That is:

A + 2B -> D + E + F (reaction 3)

How may I know the rate constant for reaction 3, assuming that I know the rate constants for reaction 1 and 2?

Thanks for all the help!
 
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Sosi said:
Hi!

I have a couple of reactions whose rate constants are known:

A + B -> C + D (reaction 1)
C + B -> E + F (reaction 2)

and I want to know the rate constants of the sum of these reactions. That is:

A + 2B -> D + E + F (reaction 3)

How may I know the rate constant for reaction 3, assuming that I know the rate constants for reaction 1 and 2?

Thanks for all the help!

You need to provide some additional information about the lability of the reactions (1 and 2) before you can proceed.
 
gabriels-horn said:
You need to provide some additional information about the lability of the reactions (1 and 2) before you can proceed.

all the species from reactions 1 and 2 are stable. I was advised to consider an open system in which the reactions were not reversible. Does this help? I'm not seeing how I can use this information...

Thanks!
 
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