A student in chemistry lab creates a buffer by making a 1.25 L solution that has 1.50 moles of  sodium hypobromite (NaBrO) and 2.50 moles of hypobromous acid (HBrO), Ka = 2*10^-9 1. What is the initial pH of the buffer?  2. What is the pH of when 0.025 moles of NaOH are added to 50.0 mL of buffer solution?  3.  Without calculating, would you expect the change in pH to be larger or smaller if 0.025 moles  of HCl was added to 50.0 mL of the buffer instead? Explain.

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 89GQ: A buffer solution is prepared by dissolving 1.50 g each of benzoic acid, C6H5CO2H, and sodium...
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A student in chemistry lab creates a buffer by making a 1.25 L solution that has 1.50 moles of 
sodium hypobromite (NaBrO) and 2.50 moles of hypobromous acid (HBrO), Ka = 2*10^-9
1. What is the initial pH of the buffer? 
2. What is the pH of when 0.025 moles of NaOH are added to 50.0 mL of buffer solution? 
3.  Without calculating, would you expect the change in pH to be larger or smaller if 0.025 moles 
of HCl was added to 50.0 mL of the buffer instead? Explain. 

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