red and Cdl 10. Reagent used to adjust the pH (mark one) (Bon are 1-00M) NaOH HCI Volume: _0 · 0 6 mL #moles: 11. Calculated theoretical pH of buffe. 12. Calculated theoretical pH of "real" buffer..

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Chapter1: Chemical Foundations
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Problem 1RQ: Define and explain the differences between the following terms. a. law and theory b. theory and...
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Please help with #10-12. I'm not sure how to
calculate the new theoretical pH when
increasing buffer pH with NaOH. Thank you
1. pH of the buffer needed to prepare:...
10. 0
(1).... Na z CO,
NaH COs
2. Reagents selected to make a buffer:
(2)....
3. Reasons for selecting the reagents:I chose these reagents because our assigned pH is
10, and the pKa of Sodium Carbonate is close to 10, along with the matching
acid Sodium Bicarbonate
4. Calculated amount of reagents needed to prepare a buffer:
reagent 2
Total Buffer volume: 100mL
reagent 1
[Buffer]: 0.05 M
0.1689
g or ml
0.2862
g or ml
1.593x10°| moles
3.407x10| moles
5. pH of a buffer measured with pH-meter.
10.07
6. Calculated ionic strength..
0.08187
7. Calculated activity coefficient.
Bicarbonate (H"): 0.7896| Carbonate: 0.3887
8. Calculated theoretical pH of "real" buffer...
10.10
9. Difference between measured and calculated pH of buffer..
0.03261
10. Reagent used to adjust the pH (mark one)
(Born are 1-0oM)
NaOH
HCI
Volume: _0 · O6 mL
#moles:
11. Calculated theoretical pH of buffer..
12. Calculated theoretical pH of "real" buffer..
13. Difference between "real" and ideal theoretical pH of buffer.
Transcribed Image Text:Please help with #10-12. I'm not sure how to calculate the new theoretical pH when increasing buffer pH with NaOH. Thank you 1. pH of the buffer needed to prepare:... 10. 0 (1).... Na z CO, NaH COs 2. Reagents selected to make a buffer: (2).... 3. Reasons for selecting the reagents:I chose these reagents because our assigned pH is 10, and the pKa of Sodium Carbonate is close to 10, along with the matching acid Sodium Bicarbonate 4. Calculated amount of reagents needed to prepare a buffer: reagent 2 Total Buffer volume: 100mL reagent 1 [Buffer]: 0.05 M 0.1689 g or ml 0.2862 g or ml 1.593x10°| moles 3.407x10| moles 5. pH of a buffer measured with pH-meter. 10.07 6. Calculated ionic strength.. 0.08187 7. Calculated activity coefficient. Bicarbonate (H"): 0.7896| Carbonate: 0.3887 8. Calculated theoretical pH of "real" buffer... 10.10 9. Difference between measured and calculated pH of buffer.. 0.03261 10. Reagent used to adjust the pH (mark one) (Born are 1-0oM) NaOH HCI Volume: _0 · O6 mL #moles: 11. Calculated theoretical pH of buffer.. 12. Calculated theoretical pH of "real" buffer.. 13. Difference between "real" and ideal theoretical pH of buffer.
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