Final answer:
The boiling point elevation constant for water is 0.52°C/m. When a solute such as glucose or sucrose is added to water, the boiling point increases by 0.52°C for every 1 mole of solute per liter of water. However, when a solute like NaCl is added, which produces 2 moles of dissolved ions per mole of solute, the boiling point increase is approximately twice as large, the correct option is D).
Step-by-step explanation:
The boiling point of a solution is determined by the boiling point elevation constant and the molality of the solute. The boiling point elevation constant for water is 0.52°C/m. When a nonvolatile molecular solute such as glucose or sucrose is added to water, the boiling point increases by 0.52°C for every 1 mole of solute per liter of water.
However, when a solute like NaCl is added, which produces 2 moles of dissolved ions per mole of solute, the boiling point increase is approximately twice as large. Therefore, option d) Na₃PO₄ could be the compound X since it produces 3 moles of dissolved ions per mole of solute.