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Chemistry
Chemistry
Problem
A researcher needs 0.50 L of a benzoic acid/sodium benzoate buffer at pH 6.00. (The pK_a of benzoic acid is 4.20.) Which molar ratio of benzoate ion to benzoic acid will give a pH closest to 6.00? a)
6.3
:
1
6.3 : 1
6.3
:
1
b)
1.8
:
1
1.8 : 1
1.8
:
1
c)
63
:
1
63 : 1
63
:
1
d)
0.016
:
1
0.016 : 1
0.016
:
1
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