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Review suggestions for CHM116 lab practical
If you were engaged throughout the semester, you should already be prepared to excel on the lab practical.
You can expect several “stations” where you’ll be asked to plan and execute work that revisits the most
fundamental topics we’ve covered:
acidbase equilibria (buffers, p
K
a
/
p
K
b
, titrations), and solubility equilibria
(
K
sp
,
K
f
, shifty equilibria).
Be able to prepare buffer solutions
• Do calculations using HendersonHasselbach (pH, p
K
a
, molarities)
• Mass out any solids, measure out liquids, use proper technique/glassware
• For these and all calculations – be attentive to details like units, sig. figs, correct formulas, states of
matter
• Anticipate “authentic assessment” – did you get the desired pH?
Be able to do titrations
Weak acid/ weak base
• Anticipate shapes of curves
• Plot curves, interpret shape, note equiv pt. and ½ equiv. pt., get p
K
a
or p
K
b
Some soluble ion to get its concentration and thus
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 Fall '11
 MATCHETT

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