Final answer:
Cu(NO3)2 solution is classified as a salt solution because it's formed from a reaction involving a metal cation and the conjugate base of a strong acid, indicating a neutral behavior in aqueous solution.
Step-by-step explanation:
The solution of Cu(NO3)2 is a salt solution. This is because the salt Cu(NO3)2 is formed by the reaction of copper(II) ion, which is a metal cation, and the nitrate ion, NO3-, which is the conjugate base of a strong acid, nitric acid (HNO3). In aqueous solutions, salts that are derived from strong acids and weak bases, strong acids and strong bases, or weak acids and strong bases will typically not affect the pH of the solution significantly, indicating that the solution is neutral or slightly acidic or basic depending on the case. However, copper(II) nitrate is mostly considered neutral in aqueous solution. It does not have the characteristic properties of a weak acid, strong acid, or base solution.