Warm Up Dissolving Warm Up Dissolving 1 What

Warm Up: Dissolving

Warm Up: Dissolving 1. What does “dissolve” mean? 2. What kinds of things dissolve? 3. What do things dissolve in?

Dissolve: to make a solution of a substance by mixing with a liquid Example: to dissolve salt in water

Mixtures and Solutions Notes Mixture Molecular View – Particle Diagrams

Introduction to Mixtures and Solutions Video: The Science of Macaroni Salad Video Link

Mixture: two or more different substances that are mixed but not combined chemically The chemical identities of the substances are not changed.

Solution: a uniform mixture of two or more substances *Uniform meaning the solution has only one color, one texture, and appears to be one substance.

Colloid • Mixture where the particles are uniformly distributed but not chemically bonded. • Normally opaque (not see thru) • Substance that consists of particles dispersed in another substance that are too small to see. • Milk, fog, mud

Suspension • Mixture where the particles of the individual substances are big enough to see.

Concentration: the amount of a particular substance in a given quantity of mixture How concentrated do you like your hot chocolate?

Concentration

Draw a Particle Diagram Kool-Aid Molecular View Imagine that you could see the Kool-Aid particles at the molecular level…

Draw a Particle Diagram Kool-Aid Molecular View Draw a diagram of the particles of Kool-Aid and water when: 1. Right when the Kool-Aid powder is added 2. After you have stirred the mixture together.

Pure Substances and Mixtures Reading and Lab ü Read the article ü Answer: Check Your Learning Questions 1 -4 ü Receive you materials for the “Try This” lab ü Answer: The lab questions A and B in notebook