a. Look back to Figure 29.18. The high resolution NMR spectrum shown is from a sample of ethanol containing traces of water. How would the NMR spectrum differ if D₂O had been added to the sample of ethanol?

b. Look back to Question 6. How would repeating the NMR analysis using a solvent of D₂O be able to help the pathologist distinguish between aspirin and paracetamol?

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3H IH 2H 6.0 5.5 5.0 4.5 4.0 3.5 3.0 2.5 2.0 1.5 1.0 0.5 0.0 8/ppm Absorption of energy