What happens in a dynamic equilibrium exits in a reaction?

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Answer 1 · 2017-07-24T15:50:03

#"Option (b) is the answer I would choose......."#

Consider the hypothetical reaction:

#A+BrightleftharpoonsC+D#

Now there is a forward rate.......

#"Rate forward"=k_f[A][B]#

And there is a reverse rate.......

#"Rate backwards"=k_r[C][D]#.

The condition of chemical equilibrium does not specify the cessation of chemical change; it does specify equality of FORWARD and REVERSE rates.

#"Rate forward"="Rate backward"#, and so.........

#k_f[A][B]-=k_r[C][D]#.......and so......

#k_f/k_r=([C][D])/([A][B])#

We commonly call the #k_f/k_r# quotient as #K_"eq"#, the # "thermodynamic equilibrium constant"#, which is usually independent of temperature.