MCAT Organic Chemistry Question 147: Answer and Explanation
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Question: 147
12. In aqueous solution, pyrophosphate will likely:
- A. form insoluble complexes.
- B. be stable and inert.
- C. degrade into inorganic phosphate.
- D. decrease the polarity of the solvent.
Correct Answer: C
Explanation:
Pyrophosphate is unstable in aqueous solution and will degrade to form two equivalents of inorganic phosphate. The solvent is water, which should retain its polarity regardless of the presence of solutes, eliminating choice (D). Pyro- phosphate and inorganic phosphate are small, charged molecules which are relatively soluble, eliminating choice (A).