4 uses of solutions?
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Gas in liquid:
Oxygen in water
Carbon dioxide in water – a less simple example, because the solution is accompanied by a chemical reaction (formation of ions). The visible bubbles in carbonated water are not the dissolved gas, but only an effervescence of carbon dioxide that has come out of solution; the dissolved gas itself is not visible since it is dissolved on a molecular level.
Liquid in liquid:
The mixing of two or more substances of the same chemistry but different concentrations to form a constant. (Homogenization of solutions)
Alcoholic beverages are basically solutions of ethanol in water.
Solid in liquid:
Sucrose (table sugar) in water
Sodium chloride (NaCl) (table salt) or any other salt in water, which forms an electrolyte: When dissolving, salt dissociates into ions.