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Polyprotic Acids
Posted: Wed Jan 22, 2020 8:06 pm
by 605110118
What is the difference between k1 and k2?
Re: Polyprotic Acids
Posted: Wed Jan 22, 2020 8:23 pm
by Renee Grange 1I
Polyprotic acids are acids that dissociate more than once. K1 is the value of K for the first ionization. K2 is the K value for the second ionization.
Re: Polyprotic Acids
Posted: Thu Jan 23, 2020 12:35 pm
by Rohit Ghosh 4F
As the acid loses a proton and then another proton, the k values for each step are different.
Re: Polyprotic Acids
Posted: Fri Jan 24, 2020 2:21 pm
by Emma Popescu 1L
Polyprotic acids can donate more than one proton. Protons are donated with the acidity constant (K) decreasing significantly with each proton lost Ka1>>ka2>>ka3. However, for most polyprotic acids (except Sulfuric acid), only the first deprotonation (Ka1) should be taken into account since all subsequent deprotonations do not affect pH significantly so are ignored.
Re: Polyprotic Acids
Posted: Fri Jan 24, 2020 5:43 pm
by Catherine Daye 1L
K1 is when an acid/base dissociates for the first time. K2 is when the resulting conjugate base/acid from the previous reaction dissociates a second time.
Re: Polyprotic Acids
Posted: Tue Feb 18, 2020 9:40 am
by Renee Grange 1I
Polyprotic acids dissociate more than once. K1 is the K value for the first dissociation and K2 is that for the second dissociation.
Re: Polyprotic Acids
Posted: Tue Feb 18, 2020 11:08 am
by Robin Cadd 1D
605110118 wrote:What is the difference between k1 and k2?
K1 is the equilibrium constant for the first dissociation; K2 is the equilibrium constant for the second dissociation. K1>>>K2