All data are to be recorded directly onto the data page in 1. 2. Yo u are advise

Question

All data are to be recorded directly onto the data page in 1. 2. Yo u are advised not to taste any chemicals in this experiment. Why not? 3. While doing "Part I - Separation of Substances Based on Physical Properties", a stud weighed the container with the unknown, poured it into a weighed beaker, then washed,dr and reweighed the original container. What did the student do that should not have ben don On the basis of what he saw and recorded, the same student decided the solid was sodium chloride. He was drawing an_AI- it. To pour off a supernatant liquid is to

Explanation / Answer

(6) Mass of sample=mass of (sample container+sample) - mass of (sample container) Mass of sample=32.345-29.972= 2.373 g Average mass of (evaporating dish +salt) = (45.676+45.671)/2 = 45.6735 g Mass of salt extracted = mass of (evaporating dish +salt) - mass of (evaporating dish) Mass of salt = 45.6735-44.780 = 0.8935 g % of salt in the sample =( mass of salt/ mass of sample)*100 % of salt in the sample = (0.8935/2.373)*100 = 37.653%

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