Problem: The density of toluene (C7H8) is 0.867 g/mL, and the density of thiophene (C4H4S) is 1.065 g/mL. A solution is made by dissolving 8.60 g of thiophene in 260 mL of toluene.Calculate the molality of thiophene in the solution.

FREE Expert Solution

We’re being asked to calculate the molality of thiophene in the solution.


When calculating for molality, we use the following equation:

molality (m)=moles solutekg solvent

Solvent → C7H8
Solute → C4H4S


We will calculate the molality of the solution using the following steps:

Step 1: Calculate the moles of the solute.
Step 2: Calculate the mass of the solvent (in kg).
Step 3: Calculate the molality of the solution.

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Problem Details

The density of toluene (C7H8) is 0.867 g/mL, and the density of thiophene (C4H4S) is 1.065 g/mL. A solution is made by dissolving 8.60 g of thiophene in 260 mL of toluene.

Calculate the molality of thiophene in the solution.

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