A student reported to her instructor that her unknown contained salt, salicylic

Question

A student reported to her instructor that her unknown contained salt, salicylic acid, and sand. In reality, the unknown contained only the first two components, but no sand. What might have led the student to believe sand was present in the unknown? How could the substance be tested to determine if it was actually sand? A mixture contains salt, zinc powder, and iron filings. Salt is soluble in water, while both zinc and iron will dissolve (by reacting) in hydrochloric acid. Describe how you would separate the three components.

Explanation / Answer

Hi....

3.THe student must add the mixture into distilled water first, salt will dissolve but salicylic acid will take some time to it.but this will also dissolve.

Then she had evaporated the dissolved part and salicylic acid would evaporated and salt remained.

If she got the ppositive result of presence of sand then may be due to the some impurities.

4.to separate the mixture of salt, iron fillings and zink powder, first we'll contact the mixture with magnet. The all iron fillings will get seperated.

Afetr that add mixture into distilled water, salt will dissolve and zinc powder won't.

Filter it, filterate will contain salt and residue will be zinc.

Thank you. Hope this helped.

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