Given that the vapor pressure of water is 17.54 torr at 20 °C , calculate the vapor-pressure lowering of aqueous solutions that are 2.10 m in sucrose, C,H,„0u, and calcium chloride. STRATEGY 1. Determine the colligative molality of each solution. 2. Convert each colligative molality to a mole fraction. 3. Apply Raoult's law. Step 1: Determine the colligative molality of each solution. Assume 100% dissociation for electrolytes. 2.10 m sucrose:

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Solutions

Solutions can be considered as homogeneous mixtures which contain two or more than two chemical substances. The chemical substance which is the greater part is defined as solvent. And the chemical substance that is dissolved in a solvent is referred to as solute. Solution chemistry plays an important role in chemistry since it supports many commercial applications of solutions.