**Boiling Point of Aqueous Solution of KI with HgI2**

The boiling point of a solution is affected by the presence of solutes dissolved in the liquid. When a solute is added to a solvent, the boiling point of the resulting solution may either increase or decrease depending on various factors such as the nature of the solute and solvent, concentration of the solute, and their interactions.

In the case of an aqueous solution of KI (potassium iodide), when HgI2 (mercury(II) iodide) is added, the boiling point of the resulting solution will increase. This can be explained by the phenomenon known as boiling point elevation.

**Boiling Point Elevation:**

Boiling point elevation occurs when a non-volatile solute, such as HgI2, is dissolved in a solvent, such as water. The presence of the solute particles disrupts the intermolecular forces between solvent molecules, making it more difficult for them to escape from the liquid phase and enter the vapor phase.

**Colligative Properties:**

Boiling point elevation is one of the colligative properties, which depend on the number of solute particles rather than their identity. In this case, the HgI2 dissociates into ions when dissolved in water, increasing the number of solute particles present in the solution.

**Van't Hoff Factor:**

The Van't Hoff factor, denoted by "i," represents the number of particles into which a solute dissociates in a solution. For HgI2, it dissociates into three particles: one Hg2+ ion and two I- ions. Thus, the Van't Hoff factor for HgI2 is 3.

**Effect on Boiling Point:**

According to the equation ∆Tb = i * Kb * m, where ∆Tb is the boiling point elevation, i is the Van't Hoff factor, Kb is the molal boiling point elevation constant, and m is the molality of the solute, we can conclude that:

- The Van't Hoff factor (i) for HgI2 is 3.
- The molal boiling point elevation constant (Kb) for water is a known constant.
- The molality (m) of the solution can be calculated by dividing the moles of solute by the mass of the solvent.

Based on this equation, it is evident that the boiling point of the aqueous solution of KI will increase when HgI2 is added due to the presence of additional solute particles and the resulting boiling point elevation.