Solute Examples in Chemistry

Start with the recap, study the fully worked examples, then use the practice problems to check your understanding of Solute.

This page combines explanation, solved examples, and follow-up practice so you can move from recognition to confident problem-solving in Chemistry.

Concept Recap

The substance that is dissolved in a solution, typically present in a smaller amount.

The thing that 'disappears' when you dissolve it — like sugar dissolving in tea. The sugar is the solute.

Read the full concept explanation →

How to Use These Examples

  • Read the first worked example with the solution open so the structure is clear.
  • Try the practice problems before revealing each solution.
  • Use the related concepts and background knowledge badges if you feel stuck.

What to Focus On

Core idea: The solute particles become evenly dispersed among the solvent particles at the molecular level.

Common stuck point: A dissolved solute hasn't 'disappeared' — its particles are still there, just too small to see.

Worked Examples

Example 1

easy
In a solution of sugar dissolved in water, identify the solute and explain its role.

Solution

  1. 1
    The solute is sugar — it is the substance being dissolved.
  2. 2
    The solute is present in a smaller amount and is dispersed uniformly throughout the solvent.
  3. 3
    The sugar molecules separate and become surrounded by water molecules.

Answer

\text{Solute: sugar (the dissolved substance)}
The solute is the minor component of a solution. It can be a solid, liquid, or gas dissolved in the solvent. The solute determines many properties of the solution.

Example 2

medium
In carbonated water, \text{CO}_2 gas is dissolved in water. Identify the solute and solvent, and explain what happens when the bottle is opened.

Practice Problems

Try these problems on your own first, then open the solution to compare your method.

Example 1

easy
In a saline solution (salt water), what is the solute?

Example 2

hard
At 20°\text{C}, the maximum solubility of \text{NaCl} in water is 36 \text{ g} per 100 \text{ mL}. If a student adds 50 \text{ g} of \text{NaCl} to 100 \text{ mL} of water at 20°\text{C}, what happens? Calculate how much solute dissolves and how much remains undissolved.
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Background Knowledge

These ideas may be useful before you work through the harder examples.

homogeneous mixture