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4. 500 mL of a buffer solution system contains 0.1 mol/L potassium lactate and 0.05 mol/L lactic acid. MWK lactate 128.17 g/mol MWlactic acid = 90.08 g/mol MWHNO3 = 63.01 g/mol pKa = 3.86 a. What is the pH of this solution? b. If a technician adds ten drops from a calibrated dropper (40 drops/mL) of nitric acid 70 % w/w solution (sp gr = 1.413), what is the final pH of this solution?

4. 500 mL of a buffer solution system contains 0.1 mol/L potassium lactate and 0.05 mol/L lactic acid. MWK lactate 128.17 g/mol MWlactic acid = 90.08 g/mol MWHNO3 = 63.01 g/mol pKa = 3.86 a. What is the pH of this solution? b. If a technician adds ten drops from a calibrated dropper (40 drops/mL) of nitric acid 70 % w/w solution (sp gr = 1.413), what is the final pH of this solution?

Chemistry & Chemical Reactivity
Chemistry & Chemical Reactivity
9th Edition
ISBN:9781133949640
Author:John C. Kotz, Paul M. Treichel, John Townsend, David Treichel
Publisher:John C. Kotz, Paul M. Treichel, John Townsend, David Treichel
Chapter17: Principles Of Chemical Reactivity: Other Aspects Of Aqueous Equilibria
Section: Chapter Questions
Problem 23PS: A buffer solution was prepared by adding 4.95 g of sodium acetate, NaCH3CO2, to 2.50 102 mL of...
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4a&b
4. 500 mL of a buffer solution system contains 0.1 mol/L potassium lactate and 0.05 mol/L lactic acid. MWK lactate 128.17 g/mol MW lactic acid = 90.08 g/mol MWHNO3 = 63.01 g/mol pKa = 3.86 a. What is the pH of this solution? b. If a technician adds ten drops from a calibrated dropper (40 drops/mL) of nitric acid 70 % w/w solution (sp gr = 1.413), what is the final pH of this solution?
Transcribed Image Text:4. 500 mL of a buffer solution system contains 0.1 mol/L potassium lactate and 0.05 mol/L lactic acid. MWK lactate 128.17 g/mol MW lactic acid = 90.08 g/mol MWHNO3 = 63.01 g/mol pKa = 3.86 a. What is the pH of this solution? b. If a technician adds ten drops from a calibrated dropper (40 drops/mL) of nitric acid 70 % w/w solution (sp gr = 1.413), what is the final pH of this solution?
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