Chem Finder is a database
of constants and properties for a variety of compounds. It also provides a
line-structural formula for each compound that can be transformed into a 3-D
structural formula if you have Chem #3. Use ChemFinder at http://chemfinder.camsoft.com/
to look up the boiling point and the dissociation constant for dichloroacetic
acid. [Use the references at the bottom and look for thermodynamic properties].
Then do the same for chloroacetic acid.
Which compound is
the stronger acid? Rationalize the order of acidity.
Which compound has
the higher boiling point? Rationalize the boiling points.
What is the approximate
bond angle at the OH of carboxyl group?
Would you expect
this acid to be stronger or weaker than acetic acid?
Will the OH group
on the benzene ring contribute significantly to the hydronium ion concentration
in an aqueous solution of the compound?
acids and bases
(http://www.chem.ualberta.ca/~plambeck/che/p101/)
The University of Alberta
offers a wide range of general chemistry tutorials. Read through the material
on acids and bases at http://www.chem.ualberta.ca/~plambeck/che/p101/,
and answer the following questions.
How did Svante Arrhenius
classify a strong acid? A strong base?
Why is Arrhenius'
concept not considered as strongly as the Bronsted- Lowry concept?
What is the Lewis
definition of an acid? A base?
How are Ka
and Kb related?
Identify the conjugate
pairs in the ionization of pure water.
In polyprotic acids,
why do the successive ionization constants decrease in magnitude?