Buffer Solutions That Maintain Certain Levels of PH or Acidity

question 149

Multiple Choice

Buffer solutions that maintain certain levels of pH or acidity are widely used in biochemical experiments.One common buffer system uses sodium dihydrogenphosphate and sodium monohydrogenphosphate.What are the formulas of these two compounds?

• A)NaHPO₄ and (NaHPO₄)₂
• B)NaH₂PO₄ and Na₂HPO₄.
• C)Na₂H₂PO₄ and NaHPO₄
• D)NaPO₄ and NaHPO₄
• E)Na₂H₂PO₄ and NaHPO₄.

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