Final answer:
When one mole of potassium chloride dissolves in water, it results in one mole of K+ ions and one mole of Cl- ions in solution. Every mole of dissolved KCl yields two moles of solvated particles, affecting the characteristics of the solution.
Step-by-step explanation:
When one mole of potassium chloride (KCl) dissolves in water, it dissociates into its constituent ions. As each KCl formula unit dissociates, it forms one K+ ion and one Cl- ion. Therefore, we can say that there is one mole of K+ ions in solution and one mole of Cl- ions in solution after the dissociation occurs.
It's important to note that ionic compounds like KCl separate into their ions upon dissolving, leading to an increase in the number of dissolved particles. This means that for every mole of KCl that dissolves, the total number of moles of particles in solution is actually two moles, one of each ion. This has implications for the properties of the solution such as its freezing point depression and boiling point elevation.