Chemistry & Chemical Reactivity
10th Edition
ISBN:9781337399074
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 16PS: A buffer solution is composed of 1.360 g of KH2PO4 and 5.677 g of Na2HPO4. (a) What is the pH of the...
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pls answer number 3
![II. Solve the following problems:
1. What is the ionic strength of a solution composed of 0.M NaCl and 0.2M
Na,SO,?
2. A carbonate buffer of pH 10 is needed by a chemist. How many grams of
Na,CO, is needed to dissolve in 1.5L of 0.2M NaHCO, to make the buffer? K.
-11
of HCO,
= 4.7 x 10"
3. What weight of Na,HPO, and H,PO, would be required to prepare 200mL of
a buffer solution of pH 7.40 that has an ionic strength of 0.2? pk = 7.12
4. How many mL of 2.0M boric acid solution must be added to 600mL of a
0.01M sodium borate in order for the pH to be 9.45? pk of H,BO, = 9.24](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2Fa541e4d4-15eb-48fd-818b-acd9ff1c4b22%2Fff56cf96-3aa7-4bde-85cc-dc77b2e3793f%2F8fa0npd_processed.jpeg&w=3840&q=75)
Transcribed Image Text:II. Solve the following problems:
1. What is the ionic strength of a solution composed of 0.M NaCl and 0.2M
Na,SO,?
2. A carbonate buffer of pH 10 is needed by a chemist. How many grams of
Na,CO, is needed to dissolve in 1.5L of 0.2M NaHCO, to make the buffer? K.
-11
of HCO,
= 4.7 x 10"
3. What weight of Na,HPO, and H,PO, would be required to prepare 200mL of
a buffer solution of pH 7.40 that has an ionic strength of 0.2? pk = 7.12
4. How many mL of 2.0M boric acid solution must be added to 600mL of a
0.01M sodium borate in order for the pH to be 9.45? pk of H,BO, = 9.24
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