Problemas
Which substance will have the greatest effect on the vapor pressure, when dissolved in water? 1 mol of sucrose a nonelectrolyte 1 mol of LiCl an electrolyte 1 mol of MgCl_(2) an electrolyte
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To determine which substance will have the greatest effect on the vapor pressure when dissolved in water, we need to consider the colligative properties of the solutions. Colligative properties depend on the number of solute particles in the solution, not on the identity of the particles.1. **Sucrose (a nonelectrolyte)**: Sucrose does not dissociate into ions when dissolved in water. Therefore, 1 mol of sucrose will produce 1 mol of solute particles.2. **LiCl (an electrolyte)**: Lithium chloride dissociates completely in water into 1 lithium ion (Li⁺) and 1 chloride ion (Cl⁻). Therefore, 1 mol of LiCl will produce 2 mol of solute particles.3. **MgCl₂ (an electrolyte)**: Magnesium chloride dissociates completely in water into 1 magnesium ion (Mg²⁺) and 2 chloride ions (Cl⁻). Therefore, 1 mol of MgCl₂ will produce 3 mol of solute particles.Since the vapor pressure lowering is directly related to the number of solute particles, the substance that produces the most solute particles will have the greatest effect on the vapor pressure.- Sucrose: 1 mol of particles- LiCl: 2 mol of particles- MgCl₂: 3 mol of particlesTherefore, **1 mol of MgCl₂** will have the greatest effect on the vapor pressure when dissolved in water.