A buffered solution with a pH near 5 is needed for an experiment. Using the above information, which of the combinations would be the best choice to prepare the buffer?Write the balanced chemical equation for each reaction below. Use proper notation and include phases where appropriate.
A.
\[ HIO_3 + KIO_3 \]
B.
\[ HC_2H_3O_2 + KC_2H_3O_2 \]
C.
\[ C_6H_5OH + C_6H_5OK \]
D.
\[ C_6H_5COOH + C_6H_5COOK \]
Exam No：AP Chemistry Practice Test Year：2024 Question No：APChemistry2024AP0410
Answer:
C
Knowledge points:
9.2 Absolute Entropy and Entropy Change
Solution:
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