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Experiment 4 Name Potentiometric Analysis of Acid in Soft Drinks: Cola vs. Uncola Purpose Calculations A. Standardization of NaOH Mean conc. NaOH solution: M Standard deviation: M Relative standard deviation (%RSD): % B. Data for titration of cola and uncola with NaOH Using Excel or a similar program, make a table with the following columns: Vol. NaOH Added pH V2 - V1 pH2 − pH (V1+V2)/2 pH2 - pH₁ V2 - V1 C. Results Cola: pH of soda after boiling: Volume NaOH required to reach first end point: ± ml; pH: Volume NaOH required to reach second end point: ± ml; pH: H3PO4 concentration: H2PO4 concentration: M %RSD: M %RSD: Uncola: pH of soda after boiling: Volume NaOH required to reach the end point: ± _ml; pH: _ Citric acid concentration: ± M %RSD: Include all information from the Calculations/Questions section as well as sample calculations; answer all questions. Check your calculations carefully! Don't forget to include copies of your lab notebook pages for this experiment. Latest Volume pH d1 d2 (mL) 123 (pH/vol) (d1/vol) 0 2.07 -0.007 0.079 0.4 2.06 0.023 0.087 0.9 2.08 0070 0.089 4 1.3 2.13 0.110 0.057 5 1.5 2.15 0.103 0.022 6 10- 1.9 2.19 0.115 0.039 7 2.2 2.23 0.132 0.057 8 2.5 2.27 0.150 0.074 9 2.9 2.34 0.179 0.117 10 3.3 2.41 0.239 0.157 11 3.6 2.50 0.311 0.086 12 3.8 2.58 0.272 0.124 13 4.4 2.69 0 364 0.275 14 4.6 2.86 0.552 0.198 15 4.9 3.01 0.474 0.029 16 5.3 3.18 0.505 0.153 17 5.7 3.38 0.652 0.086 18 5.9 3.61 0.570 -0.074 19 6.4 3.78 0.531 0.100 20 6.7 3.99 0.679 0.231 21 7 4.23 0.689 0.257 22 7.4 4.44 0.817 0.279 23 7.6 4.71 0 983 -0.553 24 7.8 4.90 0.525 -0.567 pH d1 (pH/vol) d2 (d1/vol) 5- 25 8.3 5.04 0.435 0.019 26 8.6 5.18 0.655 0.187 27 8.9 5.49 0.633 -0.344 28 9.2 5.59 0.388 -0.523 29 9.5 5.70 0 262 -0.265 pH 8.06 Acid-Base Titration 0 5 10 15 20 -0 Volume (mL) 25

Experiment 4 Name Potentiometric Analysis of Acid in Soft Drinks: Cola vs. Uncola Purpose Calculations A. Standardization of NaOH Mean conc. NaOH solution: M Standard deviation: M Relative standard deviation (%RSD): % B. Data for titration of cola and uncola with NaOH Using Excel or a similar program, make a table with the following columns: Vol. NaOH Added pH V2 - V1 pH2 − pH (V1+V2)/2 pH2 - pH₁ V2 - V1 C. Results Cola: pH of soda after boiling: Volume NaOH required to reach first end point: ± ml; pH: Volume NaOH required to reach second end point: ± ml; pH: H3PO4 concentration: H2PO4 concentration: M %RSD: M %RSD: Uncola: pH of soda after boiling: Volume NaOH required to reach the end point: ± _ml; pH: _ Citric acid concentration: ± M %RSD: Include all information from the Calculations/Questions section as well as sample calculations; answer all questions. Check your calculations carefully! Don't forget to include copies of your lab notebook pages for this experiment. Latest Volume pH d1 d2 (mL) 123 (pH/vol) (d1/vol) 0 2.07 -0.007 0.079 0.4 2.06 0.023 0.087 0.9 2.08 0070 0.089 4 1.3 2.13 0.110 0.057 5 1.5 2.15 0.103 0.022 6 10- 1.9 2.19 0.115 0.039 7 2.2 2.23 0.132 0.057 8 2.5 2.27 0.150 0.074 9 2.9 2.34 0.179 0.117 10 3.3 2.41 0.239 0.157 11 3.6 2.50 0.311 0.086 12 3.8 2.58 0.272 0.124 13 4.4 2.69 0 364 0.275 14 4.6 2.86 0.552 0.198 15 4.9 3.01 0.474 0.029 16 5.3 3.18 0.505 0.153 17 5.7 3.38 0.652 0.086 18 5.9 3.61 0.570 -0.074 19 6.4 3.78 0.531 0.100 20 6.7 3.99 0.679 0.231 21 7 4.23 0.689 0.257 22 7.4 4.44 0.817 0.279 23 7.6 4.71 0 983 -0.553 24 7.8 4.90 0.525 -0.567 pH d1 (pH/vol) d2 (d1/vol) 5- 25 8.3 5.04 0.435 0.019 26 8.6 5.18 0.655 0.187 27 8.9 5.49 0.633 -0.344 28 9.2 5.59 0.388 -0.523 29 9.5 5.70 0 262 -0.265 pH 8.06 Acid-Base Titration 0 5 10 15 20 -0 Volume (mL) 25

Chemistry
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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Experiment 4 Name Potentiometric Analysis of Acid in Soft Drinks: Cola vs. Uncola Purpose Calculations A. Standardization of NaOH Mean conc. NaOH solution: M Standard deviation: M Relative standard deviation (%RSD): % B. Data for titration of cola and uncola with NaOH Using Excel or a similar program, make a table with the following columns: Vol. NaOH Added pH V2 - V1 pH2 − pH (V1+V2)/2 pH2 - pH₁ V2 - V1 C. Results Cola: pH of soda after boiling: Volume NaOH required to reach first end point: ± ml; pH: Volume NaOH required to reach second end point: ± ml; pH: H3PO4 concentration: H2PO4 concentration: M %RSD: M %RSD: Uncola: pH of soda after boiling: Volume NaOH required to reach the end point: ± _ml; pH: _ Citric acid concentration: ± M %RSD: Include all information from the Calculations/Questions section as well as sample calculations; answer all questions. Check your calculations carefully! Don't forget to include copies of your lab notebook pages for this experiment.
Transcribed Image Text:Experiment 4 Name Potentiometric Analysis of Acid in Soft Drinks: Cola vs. Uncola Purpose Calculations A. Standardization of NaOH Mean conc. NaOH solution: M Standard deviation: M Relative standard deviation (%RSD): % B. Data for titration of cola and uncola with NaOH Using Excel or a similar program, make a table with the following columns: Vol. NaOH Added pH V2 - V1 pH2 − pH (V1+V2)/2 pH2 - pH₁ V2 - V1 C. Results Cola: pH of soda after boiling: Volume NaOH required to reach first end point: ± ml; pH: Volume NaOH required to reach second end point: ± ml; pH: H3PO4 concentration: H2PO4 concentration: M %RSD: M %RSD: Uncola: pH of soda after boiling: Volume NaOH required to reach the end point: ± _ml; pH: _ Citric acid concentration: ± M %RSD: Include all information from the Calculations/Questions section as well as sample calculations; answer all questions. Check your calculations carefully! Don't forget to include copies of your lab notebook pages for this experiment.
Latest Volume pH d1 d2 (mL) 123 (pH/vol) (d1/vol) 0 2.07 -0.007 0.079 0.4 2.06 0.023 0.087 0.9 2.08 0070 0.089 4 1.3 2.13 0.110 0.057 5 1.5 2.15 0.103 0.022 6 10- 1.9 2.19 0.115 0.039 7 2.2 2.23 0.132 0.057 8 2.5 2.27 0.150 0.074 9 2.9 2.34 0.179 0.117 10 3.3 2.41 0.239 0.157 11 3.6 2.50 0.311 0.086 12 3.8 2.58 0.272 0.124 13 4.4 2.69 0 364 0.275 14 4.6 2.86 0.552 0.198 15 4.9 3.01 0.474 0.029 16 5.3 3.18 0.505 0.153 17 5.7 3.38 0.652 0.086 18 5.9 3.61 0.570 -0.074 19 6.4 3.78 0.531 0.100 20 6.7 3.99 0.679 0.231 21 7 4.23 0.689 0.257 22 7.4 4.44 0.817 0.279 23 7.6 4.71 0 983 -0.553 24 7.8 4.90 0.525 -0.567 pH d1 (pH/vol) d2 (d1/vol) 5- 25 8.3 5.04 0.435 0.019 26 8.6 5.18 0.655 0.187 27 8.9 5.49 0.633 -0.344 28 9.2 5.59 0.388 -0.523 29 9.5 5.70 0 262 -0.265 pH 8.06 Acid-Base Titration 0 5 10 15 20 -0 Volume (mL) 25
Transcribed Image Text:Latest Volume pH d1 d2 (mL) 123 (pH/vol) (d1/vol) 0 2.07 -0.007 0.079 0.4 2.06 0.023 0.087 0.9 2.08 0070 0.089 4 1.3 2.13 0.110 0.057 5 1.5 2.15 0.103 0.022 6 10- 1.9 2.19 0.115 0.039 7 2.2 2.23 0.132 0.057 8 2.5 2.27 0.150 0.074 9 2.9 2.34 0.179 0.117 10 3.3 2.41 0.239 0.157 11 3.6 2.50 0.311 0.086 12 3.8 2.58 0.272 0.124 13 4.4 2.69 0 364 0.275 14 4.6 2.86 0.552 0.198 15 4.9 3.01 0.474 0.029 16 5.3 3.18 0.505 0.153 17 5.7 3.38 0.652 0.086 18 5.9 3.61 0.570 -0.074 19 6.4 3.78 0.531 0.100 20 6.7 3.99 0.679 0.231 21 7 4.23 0.689 0.257 22 7.4 4.44 0.817 0.279 23 7.6 4.71 0 983 -0.553 24 7.8 4.90 0.525 -0.567 pH d1 (pH/vol) d2 (d1/vol) 5- 25 8.3 5.04 0.435 0.019 26 8.6 5.18 0.655 0.187 27 8.9 5.49 0.633 -0.344 28 9.2 5.59 0.388 -0.523 29 9.5 5.70 0 262 -0.265 pH 8.06 Acid-Base Titration 0 5 10 15 20 -0 Volume (mL) 25
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