# BIO SCI 98 Lecture Notes - Lecture 1: Acid Dissociation Constant, Ph

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6 Feb 2017
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IMPORTANT EQUATIONS:
The rest of the slides at the beginning of the lecture are simply showing why these equations
work and how they derived them. If you have any questions about them, feel free to post on
the Facebook page.
1.
[C]c[D]d
∆G = ∆G° + RT ln ––––––––
[A]a[B]b
Figure out: When there are non-standard conditions, what is the delta G? And knowing what
the delta G is, we can figure out if the reaction is spontaneous or not.
2.
Keq = e(-∆G°/RT)
Figure out: At equilibrium, we can find out the delta G (naught/zero) with the Keq. And vice
versa.
3.
Figure out: We can solve for pH using the pKa and vice versa. We can also use this to figure out
how much buffer we need to maintain a certain pH
Minor review equations to know:
pH= -log (H+) also pKa = -log (Ka) and
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