Chemistry Practice Problems Molality Practice Problems Solution: Determine the molality of a solution prepared by d...

Solution: Determine the molality of a solution prepared by dissolving 9.52 g of heptane (C7H16) (100.2 g/mol) in 87 g of benzene (C6H6). Give your answer to 2 decimal places.a. 1.09 mb. 1.21 mc. 1.56 md. 2.61 me. 1.28 m

Problem

Determine the molality of a solution prepared by dissolving 9.52 g of heptane (C7H16) (100.2 g/mol) in 87 g of benzene (C6H6). Give your answer to 2 decimal places.

a. 1.09 m

b. 1.21 m

c. 1.56 m

d. 2.61 m

e. 1.28 m

Solution

Establish the molality equation and determine the molality of a mixture of 9.52 g heptane (C7H16) and 87 g benzene (C6H6)

Recall that molality can be calculated as:

molality = moles of solutekg of solvent


In this case, we need to convert the mass of heptane to moles and mass of benzene to kg

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