to differentiate between given solution on the basis of stability and particle size
Answers
A pure substance is a solid, liquid or gas which molecules which are all identical, or an infinite crystaline polymer in which all unit cells are the same, or a liquid containing a cation and an anion such as trihexyldodecyl phosphonium chloride.
A suspension is a combination of two or more substances which are not fully miscible with each other, for example a slurry of a clay mineral in water would be an example.
A solution is a combination of two or more substances which are misicible with each other. This can include two liquids such as water and ethanol (alcohol). It can include a solid solution in which some unit cells in a crystaline solid are different such as cobalt doped solid nickel. It could also include a mixture of ionic liquids such as a glass which contains both sodium and potassium randomly replacing each other.
It would also include a mixture of misible ionic liquids such as trihexyldodecyl phosphonium chloride combined with trihexyldodecyl phosphonium [CoCl4]2-.
The last example I can think of would be a mixture of gases which could be regarded as a solution of gas A in gas B. All gases are miscible with each other as a gas is mostly empty space and few interactions occur between the gas atoms / molecules.
A colloid is a dispersion of solid / liquid in a liquid in which the particles are so small that they do not settle out. As a result of Brownian motion the particles do not settle out. It is hard to draw a line between a colloidal "solution" and a suspension of nanoparticles. Faraday prepared colloidal gold which has not settled out yet, this may well be a suspension of gold nanoparticles. I do not know if the RI in London would want to open the bottle after all these years take out a drop and then place it on a graphite / copper TEM grid. You would then allow it to dry and then look with a transmission electron microscope for nanoparticles of gold. It would make a very nice experiment.
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Charu Singh
Charu Singh, BDS student at Bareilly Institute of Dental Sciences (2018-present)
Answered Jan 2, 2018 · Author has 196 answers and 150.5k answer views
A solution is a homogenous mixture composed of two or more substances. In such a mixture, a solute is a substance dissolved in another substance, known as a solvent. A suspension is a heterogeneous mixture in which the solute particles do not dissolve. A colloid is in which one substance of microscopically dispersed insoluble particles is suspended throughout another substance. Pure substances are defined as substances that are made of only one type of atom or only one type of molecule (a group of atoms bonded together).