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In Ostwald and Walker's appratus, dry ai...

In Ostwald and Walker's appratus, dry air is passed through a solution containing 20 gram of an organic non-volatile solute in 250 ml of water. Then the air was passed through pure water and then through a U-tube containing anhydroous `CaCl_(2)`. The mass lost in solution is 26 gram and the mass gained in the U-tube is 26.48 gram. Calculate the molecular mass of organic solute.

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To calculate the molecular mass of the organic solute using Ostwald and Walker's apparatus, we can follow these steps: ### Step 1: Understand the Problem We have a solution containing 20 grams of a non-volatile organic solute in 250 mL of water. The air passed through the solution loses mass due to the vaporization of the solvent, and the U-tube gains mass due to the absorption of this vapor by anhydrous CaCl₂. The mass lost in the solution is 26 grams, and the mass gained in the U-tube is 26.48 grams. ### Step 2: Calculate the Loss of Mass of the Solvent The loss in mass of the solvent can be calculated as: \[ ...
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