Question

What type of mixtures can be separated by filtration?

Answer 1

Hint: Separation can be of various types, some types of separation occur in households and some occur in laboratories. There are also many natural separation filters. The mixtures are also of different types, such as solid and liquid, solid and solid, gas and solid, etc.

Complete answer:
The mixtures that can generally be separated by filters are the mixture of solid in liquid, solid in gas and solid in solid.
Filtration is a process in which unwanted particles are separated from the wanted particles. The filter does not allow the bigger or unwanted particle to pass through, but it allows the smaller and wanted particles to pass through it.
Many things are filtered in the day to day life of the household, such as filtering smaller grains from bigger grains, filtering tea or coffee, filtering milk to separate any solid waste from it.
An example of separating solid from gas might be air purifying filters, which separate dust and other kinds of particles from air to make it purified. They are also used in air conditioners nowadays.
The examples shown above are for the mixtures that are heterogeneous, homogeneous mixtures are not separated easily. Even if homogenous mixtures are separated, they cannot be separated by filtration method.
In the laboratory also, to make chalk or calcium carbonate, filters are used. By the reaction of calcium chloride with sodium carbonate calcium carbonate and sodium chloride is formed.
The sodium chloride dissolves in water and passes through the filter, while the precipitated calcium carbonate does not pass through the filter and gets stuck.

Note:
Mostly filtration occurs in certain types of mixtures, a gas in gas can be separated, but it cannot be separated through filters, so it is not called filtration. Filtration process best works when the solute is not dissolvable in the solvent. Most simple examples of filterable mixtures are sand and water, dirt and water, etc.