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Warm Up: Dissolving Warm Up: Dissolving 1. What does “dissolve” mean? 2. What kinds of things dissolve? 3. What do things dissolve in? Dissolve 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 Mixture: two or more different substances that are mixed but not combined chemically The chemical identities of the substances are not changed. Solution 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 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 Read the article Answer: Check Your Learning Questions 1-4 Receive you materials for the “Try This” lab Answer: The lab questions A and B in notebook