How to Perform a Recrystallization ?

1 First choose a proper solvent to dissolve the impure
substance. the solvent should be like that, in cold
condition the substance is insoluble or partially soluble,
and in hot condition the substance should be completely
soluble.
2 After selecting the suitable solvent, dissolve the given
substance in it, and heat it till the substance completly
dissolve forming clear solution.
3 now filter this hot solution immediatly through the
filter paper. the insoluble impurity remains on the filter
paper and collect the filtrate in a dish and allow to cool
without disturbng the container.
4 the filtrate on cooling gives crystals which are pure,
homogenous, and bigger in size.