1. (a) Morphine will show a strong broad absorption between 3200 and 3600 cm-1 due to the two –OH groups which will be absent in heroin. Heroin will show two sharp absorptions in the 1700-1750 cm-1 region due to the C=O absorption in the two ester groups.(b) Aspirin will show two absorptions in the 1700-1750 cm-1 region as it has two groups that contain C=O whereas ibuprofen will only have one.2. (a) An ideal solution...