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5. (A) Which of the following combinations will give a buffered solution that has a pH...

5. (A) Which of the following combinations will give a buffered solution that has a pH of about 5? Explain clearly the reason for your choice. a) NH3 mixed with NH4Cl (Kb for NH3= 1.8 x10R5 ) or b) C5H5N mixed with C5H5NHCl (Kb for C5H5N = 1.7x10R9 )

(B)   What ratio of the concentrations of the conjugate acid/base pair from Part A will be needed to form a buffer solution with a pH of 6.2?

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