E. Substances were removed in the following order: iron, sand, benzoic acid and
ID: 858661 • Letter: E
Question
E. Substances were removed in the following order: iron, sand, benzoic acid and then salt. a) How would the following separations be performed? What potential advantages or disadvantages would the following order incur? Explain. sand, iron, benzoic acid, salt b) What potential advantages and disadvantages would the following order incur? Explain. iron, sand, salt, benzoic acid F. Suppose after the complete separation, contaminations were found in the individual substances. Here are some possibilities: 1) salt and benzoic acid in the sand 2) iron in the salt 3) salt in the benzoic acid 4) benzoic acid in the salt Which contaminations do you think was most likely to occur? Please explainExplanation / Answer
1. Remove iron with magnet
2. Filter out sand.
3. Chill water to precipitate acid.
4. Boil water away leaving salt.
(OR)
The filtrate contains dissolved sodium chloride. This can be recovered by heating the solution to evaporate water. Another approach is to set the filtrate aside in an open Petri dish for several days. The water evaporates, and cubic crystals of NaCl, often large ones, form. Salt recovered by evaporation is usually contaminated with brown ferric salts from the iron filings.
F)
Iron in the salt
Salt recovered by evaporation is usually contaminated with brown ferric salts from the iron filings.
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