Chemistry
10th Edition
ISBN:9781305957404
Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Publisher:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Chapter1: Chemical Foundations
Section: Chapter Questions
Problem 1RQ: Define and explain the differences between the following terms. a. law and theory b. theory and...
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Question
Can you confidently dtermine if the molarities are precise? Explain why or why not.
Transcribed Image Text:Part 2:
Use the volume of NaOH used and the molarity of NaOH to calculate moles of NaOH reacted
Use stoichiometry to determine moles of the acid reacted.
●
●
Divide moles acid by volume of the sample used to get molarity (mol/L),
Average the molarity for all trials.
0.1137
Data
Volume of
HCI
Initial
Burette
Reading
Final
Burette
Reading
Net Volume
NaOH
Moles NaOH
Used
Moles HCI
Used
Molarity of
HCI
Average
Molarity of
HCI
0.0084.
Average Molaity
Trial 1
Trial 2
10AL
0.15 Me
8.58
8.43
B5
0.000958
BULA
1200009%
34 $80.000958
60.874
Males Hel
Net volun
0.000 9/8.43
0.01 0.958
1.284
01137
lome
8.5PML
15.88 ML
7.3m2
0.000830
2007
0.00083.
0.083
Na OH
Trial 3
10 ML
15.88ML
23.4512
7.3ML
7.7712
23.
0.000983
468
0.02973
0.0883
10ML = 0.01L
Trial 4
10ML
23.65ML
30.75ML
7.1072
0-000883
0.000807
0.0001
0.000807
0807
Trial 5
10 ML
30:35A2
37.28m2
4.53m2
0.000742
0.000742
0.0742
Transcribed Image Text:Objective:
In this simple titration, you will learn the procedure and calculations involved in titrations. You will
react a solution of NaOH with a standard acid KHP. You will then use the calculated (standardized)
concentration of NaOH to calculate the concentration of an HCI solution.
Concepts:
Titrations
Data Table: Titration
Data
Part 1:
Use the molar mass of KHP to calculate moles of KHP reacted.
Use stoichiometry to determine moles of NaOH reacted.
Divide moles NaOH by volume used to get molarity (mol/L).
Average the molarity for all trials.
Mass of
KHP
Initial
Burette
Reading
Final
Burette
Reading
Moles KHP
Used
Moles NaOH
Used
Molarity
NaOH
Average
Molarity of
NaOH
Trial 1
0.49
0.88
21.25
Introduction to Titrations Data Sheet
Net Volume 1.25 -0.88 16.25-0.92
NaOH
15.33
=20.37
Mass of kw
Moles of Text P
0.0024
=
0.00 24
Males NAOld
Net volume
0.1178
Trial 2
+
0.37
0.92
16.25
حممه
0.0018
to Titrations
0.0018
0.1171
0.1137 mol/L
Trial 3
0.45
14.25
34.38
34.38 -16.45
= 18.13
20024
0.0022
0.0022
0.1213
+
Trial 4
0.31
19.72
35.7
35.7-19.72
- 15.98
00024
0.0015
0.0015
0.09387
Trial 5
0.44
1.15
19.72
19.72-1-15
-18.57
0-0024
0.0022
douzz
0-1185
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