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155. Name a compound that you could add to a solution of each of the compounds to make a buffer. Explain your reasoning in complete sentences. a. acetic acid b. sodium nitrite c. ammonia d. potassium formate e. Na2HPO4 (two possible answers)

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Related questions


Which of the following could be added to a solution of sodium acetate to produce a buffer? 

 

A) acetic acid only 

B) acetic acid or hydrochloric acid 

C) hydrochloric acid only 

D) potassium acetate only 

E) sodium chloride or potassium acetate 

 

"Acid-base buffers are most effective when the target pH of the buffer solution is close (within one unit) to the pKa of the conjugate acid in in the conjugate acid/base pair to be used in the buffer. This is called the buffer range for a particular acid/base system.

For the three questions below, select the two compounds from the list which could be most effectively combined to create a buffer at the target pH. You will not need to use all of the compounds - and should need to use each compound only once.:

1. pH 4 buffer

2. pH 7 buffer

3. pH 9 buffer

sodium acetate, Na(CH3COO)

pyridinium chloride, (C5H5NH)Cℓ

ammonium chloride, (NH4)Cℓ

ammonia, NH3

pyridine, C5H5N

formic acid, HCOOH

sodium formate, Na(HCOO)

hypochlorous acid, HCℓO

sodium hypochlorite, NaCℓO

-Please provide explanation with answer if possible :)

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