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Making the world better, one answer at a time. Propanone and propanal are soluble in water because they have polar functional groups. In propanone, the ketone functional group is polar.Water is also polar, and therefore will dissolve propanone. In propanal, the aldehyde functional group is polar.aking the world better, one answer at a time. Propanone and propanal are soluble in water because they have polar functional groups. In propanone, the ketone functional group is polar.
Explain why the crystals were gray and describe steps that you would take to obtain a colorless product. 2. The solubility of acetanilide in hot water (5.5 g/100 ml at 100 o C) is not very great, and its solubility in cold water (0.53 g/ 100 ml at 0 o C) is significant.dd 5 ml of distilled water to the test tube and then add 20 drops of acetic anhydride again using a medicine dropper (Fig.1). stir, the mixture using stirring rod for 5 minutes until solid forms.