Chapter7: Statistical Data Treatment And Evaluation
Section: Chapter Questions
Problem 7.10QAP
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![4. What effect, if any, would an insoluble, solid impurity have on the melting point of
benzoic acid?](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2F1500f00d-ba9e-4c73-85c9-551267b6f6b7%2F4fc22dd4-b79f-4622-9b36-d2226b66bc43%2Fuiuboj_processed.png&w=3840&q=75)
Transcribed Image Text:4. What effect, if any, would an insoluble, solid impurity have on the melting point of
benzoic acid?
![Excess H20 Added
Slow/Fast
Sample #
Starting Mass
Mass Recovered
М.Р.
(mL)
Crystallization
1
041869|120.0- 120:5
O.42349 119.8 -1203
0:32429|120.7-121:3
slow
2
0.5046g
fast
3
D4920g
0.49339
Slow
4
fast
). 37089 121.9 - 122.7
0:49109
D.3019g
122:0-122.7
10
slow
10
fast
0-3472g
1a१-122-१
Observations:
• The
in compan'son to
the fast cooling.
slow cooling had a
lower
vange
added, the nigher the
me Hing point
The
move
water that
was
Calculate the % recovery for each sample
= mass
after
x100
mass
before
#4) 0.37089
#1) 0.41869
O-4991g
83.871.
75.17%%
0.4933g
#5) 0.30199
0 49109
#2) 0.42349
0:50469
83.91%
61.49%0
#6) 0.3472g
6.50149
69.25%0
#3) 0.32429
O.49209
65.89%
%3D](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2F1500f00d-ba9e-4c73-85c9-551267b6f6b7%2F4fc22dd4-b79f-4622-9b36-d2226b66bc43%2F5l9uk1r_processed.png&w=3840&q=75)
Transcribed Image Text:Excess H20 Added
Slow/Fast
Sample #
Starting Mass
Mass Recovered
М.Р.
(mL)
Crystallization
1
041869|120.0- 120:5
O.42349 119.8 -1203
0:32429|120.7-121:3
slow
2
0.5046g
fast
3
D4920g
0.49339
Slow
4
fast
). 37089 121.9 - 122.7
0:49109
D.3019g
122:0-122.7
10
slow
10
fast
0-3472g
1a१-122-१
Observations:
• The
in compan'son to
the fast cooling.
slow cooling had a
lower
vange
added, the nigher the
me Hing point
The
move
water that
was
Calculate the % recovery for each sample
= mass
after
x100
mass
before
#4) 0.37089
#1) 0.41869
O-4991g
83.871.
75.17%%
0.4933g
#5) 0.30199
0 49109
#2) 0.42349
0:50469
83.91%
61.49%0
#6) 0.3472g
6.50149
69.25%0
#3) 0.32429
O.49209
65.89%
%3D
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