H2O (water) exists in three different phases in nature - solid (ice), liquid (water), and gas (water vapour or steam). Any substance that has been dissolved in water is said to be in an aqueous state (remember that aqua means water). So, for water to be in an aqueous state is in itself, a contradiction. read more
Aqueous means that the compound, or element is in form of a solution (where solvent is water). Liquid means that the compound, or element is in its liquid state. Consider these two examples: 1. NaCl(aq) 2. NaCl(l) 1. For table salt to be aqueous you need to dissolve it water, and you can do it at room temperature (25°C). 2. read more