Equilibrium constant and rate constant

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Discussion Overview

The discussion centers on the relationship between the equilibrium constant (K) and the rate constant (k) in chemical kinetics and equilibrium. Participants explore the definitions and implications of these constants in the context of chemical reactions.

Discussion Character

  • Exploratory, Technical explanation, Debate/contested

Main Points Raised

  • One participant asks about the relationship between K and k, seeking clarification on their meanings.
  • Another participant requests specificity regarding which types of equilibrium constants are being discussed (e.g., Ka, Kb, Kp, Kc).
  • A participant notes the distinction in capitalization between K and k, suggesting that the relationship seems obvious to them.
  • Several participants clarify that k is a rate constant associated with kinetics, while K represents a ratio of equilibrium compositions.
  • One participant asserts that K and k are fundamentally different, emphasizing their distinct roles in chemical reactions.
  • Another participant states that at equilibrium, the forward and reverse reactions occur at the same rate, implying a connection between the equilibrium constant and the ratio of rate constants.

Areas of Agreement / Disagreement

There is no consensus on the relationship between K and k, with some participants asserting they are different while others suggest a connection exists through the rates of reactions at equilibrium.

Contextual Notes

Participants have not fully defined the specific types of equilibrium constants being referenced, and there may be assumptions about the context of the discussion that are not explicitly stated.

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Hi every body,

I am just asking myself if the two constants K and k have some relations with each other. Could anyone explain more about this?

Thanks
 
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could you be more specific? Are you talking about Ka, Kb, Kp, Kc or something else?
 
Ha, I failed to notice one is capitalized (K) and the other is not(k)! (im going blind)

I should then say that the relations seem more than obvious.
 
Thank you for your answering me. Anyway, could you please explain a little bit more ?
 
k is a rate constant for kinetics

K is a ratio of equillibrium compositions

I think that is what you needed?
 
sicjeff said:
k is a rate constant for kinetics

K is a ratio of equillibrium compositions

I think that is what you needed?

No, they are different, totally.
 
Equilibrium is where the forward reaction and reverse reaction have the same rate.

The equilibrium constant will be equal to the ratio of the rate constants.

Is that what you were looking for?
 

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