In chapter 15.2, we learned about what makes up an aqueous solution. When someone adds a solute to a solvent, the solute dissolves in the solvent. Take Sodium Chloride (NaCl) and Water (H2O) for example. When the NaCl is added to the H2O, the H2O molecules attack the NaCl molecules. This then leads to the dissolving of the Na and Cl ions, which begin to float around freely and become surrounded by water ions. The water then can conduct electricity due to the freely moving positive and negative charges.
The negative Chlorine ions are attracted to the positive Hydrogen ions while the negative Oxygen ions are attracted to the positive Sodium ions. All of this helps to lead to the solution.