We’re being asked to **calculate for the molality **of an aqueous solution prepared by* dissolving ***25.1 g of solute in 100.9 g solvent**

When calculating for **molality**, we use the following equation:

$\overline{){\mathbf{Molality}}{\mathbf{}}\mathbf{\left(}\mathbf{m}\mathbf{\right)}{\mathbf{=}}\frac{\mathbf{moles}\mathbf{}\mathbf{of}\mathbf{}\mathbf{solute}}{\mathbf{kg}\mathbf{}\mathbf{of}\mathbf{}\mathbf{solvent}}}$

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

**Step 1***: **Calculate the moles of solute*

**Step 2:*** **Calculate the mass of solvent in kg*

**Step 3***:** Calculate the molarity of the solution*

**Step 1: ****Calculate the moles of solute using molar mass**

If you combine 25.1 g of a solute that has a molar mass of 25.1 g/mol with 100.0 g of a solvent, what is the molality of the resulting solution?

Frequently Asked Questions

What scientific concept do you need to know in order to solve this problem?

Our tutors have indicated that to solve this problem you will need to apply the Molality concept. You can view video lessons to learn Molality. Or if you need more Molality practice, you can also practice Molality practice problems.

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Based on our data, we think this problem is relevant for Professor Kieber Emmons' class at UTAH.