Lab questions for experiment Physical prperties of substanc

Lab questions for experiment ( Physical prperties of substances)

Q; 3, 4, and 5 ?

2. You are advised not to taste any chemicals in this experiment. Why not? To avoid Contamination. 3. While doing “Part I - Separation of Substances Based on Physical Properties”, a student weighed the container with the unknown, poured it into a weighed beaker, then washed, dried and reweighed the original container. What did the student do that should not have been done? ) 2 He 4. On the basis of what he saw and recorded, the same student decided the solid was sodium chloride. He was drawing an _I_ 5. To pour off a supernatant liquid is to

Solution

Answer 3

The student should not have washed the the container...

Because this leads to sticking and leaving the impurities which might be present in the water , disturb and interfere and Distort and may react in the experiment.

Answer 4. He was drawn an Inference.

Answer 5 . Skimming.