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Chem 112
Final Exam
18
Chemistry
Undergraduate 1
04/19/2009

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Term
KHP is an ____________ salt
Definition
acidic
Term
pH of natural water
Definition
6.5-8.5
Term
Human pH is resistant to drastic changes while ____________ is not.
Definition
the ocean
Term
When is a buffer is most effective?
Definition
It is being within 1 pH unit of the pKa.
Term
net ionic equation before the equivalence point
Definition
carbonate + H+ -> water + bicarbonate
Term
Oceans buffered by:
Definition
Bicarbonate & Carbonate
Term
Which principle says equilibrium will always be established?
Definition
Le Chatelier's
Term
It is possible to use the Universal Indicator to determine the pH because ___________________
Definition
there were color changes for specific ranges of pH
Term
All buffers consist of a ____________ acid/base pair
Definition
conjugate
Term
KHP is useful to determine the concentration of ______ in exp. 11
Definition
NaOH
Term
Henderson Hasselbach equation
Definition
pH=pKa+log [base/acid]
Term
net ionic equation at equivalence point
Definition
bicarbonate + H+ -> water + carbonic acid
Term
formula for pH
Definition
pH=-log[H3O+]
Term
formula for pKa
Definition
pKa=-log[Ka]
Term
the ___________ degree of buffering occurs when pH=pKa, and this happens when the _________ of the acid component _________________ the ____________ of the basic component.
Definition
greatest
concentration
equals
concentration
Term
blood buffered by:
Definition
carbonic acid & bicarbonate
Term
pH scale is a _____________________ scale
Definition
logarithmic
Term
% error
Definition
[calculated mass - actual mass]
_______________________________ x 100
actual mass
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