Here's why:
* State symbols are used to represent the physical state of a substance at a given temperature and pressure. Common state symbols are:
* (s) for solid
* (l) for liquid
* (g) for gas
* (aq) for aqueous (dissolved in water)
* Sodium chloride solution is a homogeneous mixture of sodium chloride (NaCl) dissolved in water. The state symbol "(aq)" is used to indicate that the sodium chloride is dissolved in water.
Therefore, you wouldn't use a state symbol for the entire solution, but rather for the components:
* NaCl (s) represents solid sodium chloride.
* H₂O (l) represents liquid water.
* NaCl (aq) represents dissolved sodium chloride in water.
