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Understanding Mixtures: Solutions, Suspensions, and Colloids Explained

This guide explores the concepts of mixtures in chemistry, focusing on solutions, suspensions, and colloids. A homogeneous mixture consists of solute and solvent, where the solute is dissolved. Solutions include examples like saltwater, while suspensions (like muddy water) have larger particles that settle without stirring. Colloids (e.g., milk) contain particles that remain suspended. Key differentiators include particle size and the Tyndall Effect, which helps distinguish between solutions and colloids. Learn about electrolytes and non-electrolytes and the categories of solutions: unsaturated, saturated, and supersaturated.

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Understanding Mixtures: Solutions, Suspensions, and Colloids Explained

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Presentation Transcript

  1. Warm-Up • In your own words, define the word mixture.

  2. Solution Chemistry A Closer Look a Mixtures

  3. Solutions • Homogeneous mixture of two or more substances in a single phase • Two components • Solute- the substance being dissolved • Solvent- the substance doing the dissolving • Can be a mixture of solids, liquids, and gases • Ex- air, brass, salt water

  4. Suspension • A mixture in which the solute particles are so large, the eventually settle out unless the mixture is constantly stirred • Particles larger than 1000nm in diameter • Particles can be separated using filter paper • Ex- muddy water

  5. Colloid • Mixtures with solute particles between 1 and 1000nm in diameter • Particles able to remain suspended throughout the solvent • Ex- milk, smoke, gelatin, foams

  6. How can we tell them apart? • Suspensions will eventually settle out • For solutions and colloids, we can refer to the Tyndall Effect • If we shine a light on a mixture, and the light does not scatter, it is a solution • If the light does scatter, it is a colloid.

  7. Types of Solutes • Electrolyte- A substance that dissolves in water to give a solution that conducts electric current • Nonelectrolyte- A substance that dissolves in water to give a solution that does not conduct an electric current

  8. Three Categories of Solutions • Unsaturated solution- A solution that contains the less than the maximum amount of dissolved solute • Saturated solution- A solution that contains the maximum amount of dissolved solute • Supersaturated solution- A solution that contains more than the maximum amount of dissolved solute

  9. Exit Ticket: To be Turned in • Explain the difference between a solution, suspension, and a colloid. Explain how we can tell them apart.

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