Some skin ointments contain a white solid, camphor (a hydrocarbon). Before incorporation into the ointment, a natural sample of camphor was found to be contaminated with table salt (sodium chloride) and rust (hydrated iron(III) oxide). The effect of three liquids on these substances is shown in the table below.
Liquid
water
ethanol
dilute hydrochloric acid
<b>table salt</b>
dissolves to produce a colourless solution
no effect
dissolves to produce a colourless solution
<b>camphor</b>
no effect
dissolves to produce a colourless solution
no effect
<b>rust</b>
no effect
no effect
reacts to give a brown solution
Describe how you would obtain pure and dry camphor from the impure sample of camphor (without using sublimation).