Question

How do you calculate moles of solute?

Answer 1

Moles of solute:

• A solution is a special type of homogeneous mixture composed of two or more substances.
• A solution is composed of solvent and solute.
• The solute is a substance dissolved in another substance, known as a solvent.
• Moles are the number of particles present in a given amount of substance.

$\mathrm{Number}\mathrm{of}\mathrm{moles}\mathrm{of}\mathrm{solute}=\frac{\mathrm{Mass}\mathrm{of}\mathrm{solute}}{\mathrm{Molar}\mathrm{mass}\mathrm{of}\mathrm{solute}}$

Example for finding moles of solute:

Step 1 Number of moles of solute:

The number of moles of solute $32.4\mathrm{g}$of Sucrose that is dissolved in$100\mathrm{mL}$ of water.

Given mass of sucrose is $32.4\mathrm{g}$

The molar mass of sucrose is $324\mathrm{g}$

$$\begin{gathered} \mathrm{Number}\mathrm{of}\mathrm{moles}=\frac{\mathrm{Mass}\mathrm{of}\mathrm{solute}}{\mathrm{Molar}\mathrm{mass}} \\ \mathrm{Number}\mathrm{of}\mathrm{moles}=\frac{32.4}{324} \\ \mathrm{Number}\mathrm{of}\mathrm{moles}=0.1 \end{gathered}$$