Consider the reaction that converts pyruvic acid (CH3COCOOH)
into gaseous acetaldehyde (CH3CHO) and gaseous CO2, which is
catalyzed in aqueous solution by the enzyme pyruvate decarboxylase.
Assume ideal gas behavior for CO2.
(a) Calculate delta-G (298 K) for this reaction at 160
bar.
(b) Calculate delta-G (298K) for this reaction at 100 bar. State
any important assumption needed in addition to ideal gas
behavior.
Consider the reaction that converts pyruvic acid (CH3COCOOH)
into gaseous acetaldehyde (CH3CHO) and gaseous CO2, which is
catalyzed in aqueous solution by the enzyme pyruvate decarboxylase.
Assume ideal gas behavior for CO2.
Calculate ?rG (298 K) for this reaction at 160 bar.
Write appropriate structural formulas for a cyclic molecule that is a constitutional isomer of
cyclohexanemolecules with the formula C6H12 that contain one ring and that
are enantiomers of each othermolecules with the formula C6H12 that contain one ring and that
are diastereomers of each othermolecules with the formula C6H12 that contain no ring and that
are enantiomers of each othermolecules with the formula C6H12 that contain no ring and that
are diastereomers of each other.
How many sets of equivalent carbon atoms are there in propane
and write the structural formulas for the two isomeric C3H7Br
compounds and name each compound.
How many sets of equivalent carbon atom are there in each isomer
of C3H7Br? Explain.
Draw structural formulas for the isomeric C3H7Br2 compounds and
name them. How many sets of equivalent carbon atoms are there in
each isomer?
Draw structural formulas for the isomeric C3H7Br3 compounds and
name them. How many sets of equivalent...
A
0.050 M solution of pyruvic acid, an intermediate in metabolism,
has a pH of 1.91. Calculate K for pyruvic acid, a weak monoprotic
acid. Use significant figures and “E” for scientific notation.
The pH of a 0.50 M solution of ethylamine CHCHNH is 12.17.
Calculate the K of ethylamine. Use significant figures and “E” for
scientific notation.
Using names and structures show the transformation of pyruvic
acid to ethyl alcohol. At the arrows between each step give the
names of the enzyme and coenzyme involved.
What is the pH of a buffer solution that contains 0.350M pyruvic
acid and 0.150M sodium pyruvate? Ka = 4.1x10^-3
Select one:
A. 4.72
B. 2.82
C. 2.02
D. 2.76
What is the pH of a 100.0mL buffer solution that contains 0.215M
acetic acid and 0.255M sodium acetate after 0.055 mmol HCl is
added. Assume no volume change. Ka = 1.8x10^-5.
Select one:
A. 4.61
B. 4.87
C. 5.03
D. 5.48
Calculate the change in pH after 0.010
mole HCl...