Chapter 14 Chemical Equilibrium
equilibrium in Hemoglobin
shiftsrightat 02 inlungs
bindingtoHbinlungs
Hb 0 Hbo
releasing02in cells
shiftsleftat 0 intissues
Dynamicequilibrium
a f CB
At start because weonlyhavereactants the rxn onlyshiftsright
As c is beingproducedthe rxn slowsdown 99C suspeed
becausethereverse ran canhappen
After a while the rate oftheforwardran rate ofreverse rxn Dynamiceg'm
Equilibriummeansthat thepartialpressureandconcentration is unchanging
NOT THE AMOUNT
sartialpressureofproducts partialpressureofreactants d rateofforwardrxn.tt rate ofreverseran
0
Even if theamounts aredifferentforeach
their rate isequalandpp and concentration
unchanging I
, Equilibrium constant
aA b I Cccag docag
lag Bag
k
it c the ran order
lawofmassaction
man
a
Equilibrium constantappliesto a systemwhichis chemicallybalanced
concentrations Kc in aqueoussolutions
K
C Dd
Equilibriumconstants a b Neverfor liquidsor
a B
g mn
and
Kp Kp
Relating Kpand Kc
partialpressures in bar are notthe same as concentration in Mol L
BUT
If gasesbehaveideally A
concentration
I
gas law PV nRT P f RT
PAE A RT
A
IF
substitute A in the K equation
equilibrium in Hemoglobin
shiftsrightat 02 inlungs
bindingtoHbinlungs
Hb 0 Hbo
releasing02in cells
shiftsleftat 0 intissues
Dynamicequilibrium
a f CB
At start because weonlyhavereactants the rxn onlyshiftsright
As c is beingproducedthe rxn slowsdown 99C suspeed
becausethereverse ran canhappen
After a while the rate oftheforwardran rate ofreverse rxn Dynamiceg'm
Equilibriummeansthat thepartialpressureandconcentration is unchanging
NOT THE AMOUNT
sartialpressureofproducts partialpressureofreactants d rateofforwardrxn.tt rate ofreverseran
0
Even if theamounts aredifferentforeach
their rate isequalandpp and concentration
unchanging I
, Equilibrium constant
aA b I Cccag docag
lag Bag
k
it c the ran order
lawofmassaction
man
a
Equilibrium constantappliesto a systemwhichis chemicallybalanced
concentrations Kc in aqueoussolutions
K
C Dd
Equilibriumconstants a b Neverfor liquidsor
a B
g mn
and
Kp Kp
Relating Kpand Kc
partialpressures in bar are notthe same as concentration in Mol L
BUT
If gasesbehaveideally A
concentration
I
gas law PV nRT P f RT
PAE A RT
A
IF
substitute A in the K equation
