[nico123]

the lab was to separate a mixture of sodium bicarbonate and ammonia chloride using hot water to dissolve them. then cool them to have the sodium bicarbonate reform. then use filter paper to retrieve it. later after the paper is dried and sodium bicarbonate crystallizes find mass of it.

the questions are: which techniques could be used to test the purity of the crystals? how would this be done?

and

what are the possbile sources of error and improvements to your experiment.

how can i answer these questions