Revision notes for Chemistry O Level

o Dry paper in oven. o Spray it with locating agent. o Heat it for 10 minutes in oven Assesing purity from m.p./b.p: o Pure substances have a definite, sharp m.p./b.p. o Substance+impurity has lower m.p. and higher b.p. o More impurity means bigger change. 2.3 Filtration Mixture goes in a funnel with filter paper, into a flask. ................
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