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Exercise 1
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EXERCISE 1
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Known:
group Tris stock solution (0.5
M
)
Acid
Volume
Added
Measured
pH
initial pH
0
9.01
mL Acid added
0.2
8.04
stop if pH falls
below 1 insert
more rows as
needed
0.4
7.8
0.6
7.52
0.8
7.34
1
7.02
1.2
6.51
etc.
Known:
group sucrose stock
solution (1.5
M
)
Acid
Volum
e
Added
initial pH
0
mL Acid added
0.2
stop if pH falls
below 1 insert more
rows as needed
0.4
0.6
0.8
1
1.2
etc.
Known:
group
sucrose &
Tris working soln
Acid
Volum
e
Added
initial pH
0
mL Acid added
0.2
stop if pH falls
0.4
Exercise 1
Page
4
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7
Group Members: _____
_______________
_____________________________Exercise_______Date: ___________
LI ______________________
Unique __________ Day: __________
Room: _______
Lab Start Time ________
below 1 insert
more rows as
needed
0.6
0.8
1
1.2
etc.
Unknown Solution
#2
Acid
Volum
e
Added
Measur
ed pH
initial pH
0
8.7
mL Acid added
0.2
6.82
stop if pH falls
below 1 insert
more rows as
needed
0.4
6.33
0.6
4.84
0.8
4.79
1
4.73
1.2
1.49
etc.
(3)INDIVIDUAL: For the following question, obtain the values for X,Y,and Z from your LabInstructor.A student, who has not learned how to properly prepare solutions, added X gof Y solidmaterial (FW = ???) to exactly 150.0 mLof dH2O and assumed that a 0.5 Msolution hadbeen prepared. The total solution volume increased to Z mLafter the the solution wasthoroughly mixed and the solid material was dissolved. X=10.059gY= Deoxyribose (134.13 g mol−1)Z=165 mL(a.)Determine the actual concentration of the solution prepared by the student.
Exercise 1
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EXERCISE 1
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