O-Chem Study Guide : Quiz #2
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26 Terms
a bronsted acid is a …
proton donor ( H+)
a bronsted base is a …
proton acceptor
a lewis acid is an …
electron pair acceptor
a lewis base is a …
electron pair donor
H+ = …
H3O
pH = …
-log [ H+]
The stronger the acid is …
the weaker its conjugate base
pKa = …
logKa
the smaller the pKa…
the more acidic
The equilibrium will always …
favor formation of the weaker acid
What is the way to describe how reactants turn into products using arrows called ?
Mechanism
What is the pKa of water ?
15.7
What are the four halogen acids ?
hydroflouric acid, hydrochloric acid, hydrobromic acid, and hydroiodic acid
The longer the bond = the easier it is to break = …
more hydrogens released = more acidic
What is the pKa value for alcohol (OH)?
16
What is the pKa value for carboxylic acid ?
4.7
With the inductive effect you can only compare two structures…
at the same carbon
( Henderson Haselbach Equation) pKa = …
pH + log [HA]/[A-]
HA = …
acid
A- =
conjugate base
What equation describes what species look like at a certain pH ?
The Henderson Haselbach Equation
When pH = pKa….
acid and conjugate bases are equal
The compound exists primarily in its acidic form when…
pKa > pH
The compound exists primarily in its conjugate base form…
pH > pKa
At equilibrium which side of the reaction is favored (——>)?
the side with the weaker acid (or base)
If a molecule has a minus sign , it has extra electrons and…
is almost always the base