05 ± 2.0e-4 (Analytical Balance) Total volume of Sample Stock, mL: 75 ± 0

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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In this double titration experiment determining composition of soda ash, you are given the following data:

  1. M HCl titrant: 0.0501 M +/- 0.0507
  2. Mass of soda ash sample, g: 0.2505 ± 2.0e-4 (Analytical Balance)
  3. Total volume of Sample Stock, mL: 75 ± 0.05 (100mL graduated cylinder)
  4. Volume of Sample Stock Aliquot, mL: 25 ± 0.3

Find the missing information. Show solutions

 

Phenolphthalein Endpoint
Answer the concentrations in 3 significant figure.
The tolerance or error should follow the decimal place of the value.
You can use scientific notation using "e". Example: 0.0010 = 1.0e-3
Note that the confidence interval is totally separate from the tolerance/errors.
Trial
1
2
Net vol. of HCI
7.60 ± 0.14
7.90 + 0.14
7.90 + 0.14
(Vph), ML
Final titrant
volume in
calculations,
0.1000
0.1000
0.1000
mL
% composition
+I
+1
+1
Transcribed Image Text:Phenolphthalein Endpoint Answer the concentrations in 3 significant figure. The tolerance or error should follow the decimal place of the value. You can use scientific notation using "e". Example: 0.0010 = 1.0e-3 Note that the confidence interval is totally separate from the tolerance/errors. Trial 1 2 Net vol. of HCI 7.60 ± 0.14 7.90 + 0.14 7.90 + 0.14 (Vph), ML Final titrant volume in calculations, 0.1000 0.1000 0.1000 mL % composition +I +1 +1
Methyl Orange Endpoint
Answer the concentrations in 3 significant figure.
The tolerance or error should follow the decimal place of the value.
You can use scientific notation using "e". Example: 0.0010 = 1.0e-3
Note that the confidence interval is totally separate from the tolerance/errors.
Trial
1
2
3
Net vol. of HCL
12.00 ± 0.14 12.20 ± 0.14
12.00 ± 0.14
(Vmo), mL
Final titrant
volume in
calculations
0.100
0.100
0.100
% composition
+1
+I
Transcribed Image Text:Methyl Orange Endpoint Answer the concentrations in 3 significant figure. The tolerance or error should follow the decimal place of the value. You can use scientific notation using "e". Example: 0.0010 = 1.0e-3 Note that the confidence interval is totally separate from the tolerance/errors. Trial 1 2 3 Net vol. of HCL 12.00 ± 0.14 12.20 ± 0.14 12.00 ± 0.14 (Vmo), mL Final titrant volume in calculations 0.100 0.100 0.100 % composition +1 +I
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