Question

How could you separate zinc chloride from $Si{O}_2$?

Answer 1

Hint: By using the concept of solubility, we can easily separate the zinc chloride from the mixture of silicon dioxide as silicon dioxide is insoluble in water. Now answer the statement.

Complete answer:
First let's discuss silicon dioxide. Silicon dioxide is an inorganic compound and is formed by the action of the oxygen on the silicon and has weak solubility in water and doesn’t dissolve into it.
On the other hand, zinc chloride consists of the zinc and chlorine and is formed by the action of the chlorine on the zinc metal.
Now considering the statement as;
Zinc chloride can be separated from the mixture of the silicon dioxide by dissolving the silicon dioxide in a suitable solvent i.e. the water or the organic solvent i.e. the ethanol.
It is so because when we dissolve the mixture of the zinc chloride and the silicon dioxide in water, then the silicon dioxide, being an inorganic compound , is insoluble in water and does not dissolve in the water and by the process of the filtration, we can easily separate the silicon dioxide from it.
Now, the resultant solution consists only of the zinc chloride.
Hence, in this way, we can quickly and easily separate the zinc chloride from the silicon dioxide.

Note:
Mixtures are those substances which consist of two or more compounds and these mixtures can be easily separated through the physical methods such as filtration, crystallization, fractional distillation etc.