Physical Properties
Caffeine is a soft, white crystal or powder with an intensely bitter taste when in its pure form. It is odourless as there are no gas molecules being given off due to its solid state. Caffeine has a molar mass of 194.19g/mol. It is a molecular solid with low conductivity. Caffeine is soluble in water because water
can hydrogen bond to caffeine at six different places. The hydrogen of the
water molecule is attracted to the highly electronegative nitrogen and oxygen
atoms.
Figure 2
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