At room temperature ( 22 ° C ) , the rate constant for proton transfer between water molecules in solution is about 1 × 10 11 s − 1 , which is one of the fastest known reactions in a condensed phase. If the activation energy for this process equals one-half of the O − H bond strength of 498 kJ / mol , what is the pre-exponential factor A for this reaction?
At room temperature ( 22 ° C ) , the rate constant for proton transfer between water molecules in solution is about 1 × 10 11 s − 1 , which is one of the fastest known reactions in a condensed phase. If the activation energy for this process equals one-half of the O − H bond strength of 498 kJ / mol , what is the pre-exponential factor A for this reaction?
Solution Summary: The author explains that the value of pre-exponential factor A for the proton transfer reaction between water molecules is to be calculated.
At room temperature
(
22
°
C
)
, the rate constant for proton transfer between water molecules in solution is about
1
×
10
11
s
−
1
, which is one of the fastest known reactions in a condensed phase. If the activation energy for this process equals one-half of the
O
−
H
bond strength of
498
kJ
/
mol
, what is the pre-exponential factor
A
for this reaction?
Under aqueous acidic conditions, nitriles will react to form a neutral organic intermediate 1 that has an N atom in it first, and then they will continue to react to
form the final product 2:
☐
:
P
Draw the missing intermediate 1 and the final product 2 in the box below. You can draw the two structures in any arrangement you like.
CN
H₂O
H₂O
H+
H+
Click and drag to start drawing a
structure.
Х
Organic bases have lone pairs of electrons that are capable of accepting protons. Lone pair electrons in a neutral or negatively charged species, or pi electron pairs. Explain the latter case (pi electron pairs).
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