Question

What is an aqueous solution?

Answer 1

In a solution, if water us a solvent other than any liquids then we call it aqueous solution.
If the solution does not contain water as a solvent we call it non aqueous solution

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Answer 2

The first solvation shell of a sodium ion dissolved in water.

An aqueous solution is a solution in which the solvent is water. It is mostly shown in chemical equations by appending (aq) to the relevant chemical formula. For example, a solution of table salt, or sodium chloride (NaCl), in water would be represented as Na+(aq) + Cl−(aq). The word aqueous (comes from aqua) means pertaining to, related to, similar to, or dissolved in, water. As water is an excellent solvent and is also naturally abundant, it is a ubiquitous solvent in chemistry. Aqueous solution is water with a pH of 7.0 where the hydrogen ions (H+) and hydroxide ions (OH-) are in Arrhenius balance (10-7).