Chem 125
Winter 2011
Dr. Nguyen
Name: Roman Ferro and Kwaku Farkye
Lab Day & Time :
Wed 5pm
AcidBase Chemistry: Titrations
Lab Report Due:
By the end of lab for Wednesday evening lab; by the beginning of lecture on
Wednesday 3/9/11 for Monday evening lab.
Each GROUP is to submit a GROUP report this week.
PLEASE work on this together, don’t let one person do all the work.
Part 1A:
Titration of Strong Acid with Strong Base
Formula of Acid:
HCl
Concentration of Acid:
0.10M
Formula of Base:
NaOH
Concentration of Base:
0.05M
1.
In the space below, write the balanced chemical equation (including states of matter) for this
reaction.
HCl(aq) + NaOH(l) > NaCl(aq) + H2O(l)
2.
In the space below, calculate the volume of base required to reach the equivalence point of this
titration.
Remember that you used 3.0 mL of acid in this titration.
M1V1=M2V2
V2=(.1Mx5ml)/.05M
= 10mL
(5mL was accidently used instead of 3mL)
3.
At the equivalence point, is the solution expected to be (circle one):
acidic
basic
neutral
In the space below, explain your reasoning.
The solution is expected to be neutral at the equivalence point because we are mixing a strong acid
with a strong base, which should yield a neutral solution.
4.
What is the
exact pH
of your solution at the equivalence point?
8.34
In the space below, show or explain how you determined your pH at the equivalence point.
In order to calculate the exact value of the equivalence point, we made a graph of the derivative of
ph from the ph vs. time graph from our procedure. The peak of this graph represented equivalence
point of our reaction.
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 Fall '08
 Retsek
 Chemistry, Equivalence point

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