Chapter 3 Mixtures, Elements, and Compounds Classification of matter: We classify matter according to what it is made up of because it makes it easier for us to study. There are four classes of matter 1. Mixtures 2. Elements 3. Compounds 4. Solutions Mixtures: matter that consists of two or more substances mixed together but not chemically combined. Properties of Mixtures: 1. Mixtures can be composed of elements, compounds, or both a.) They can be solids, liquids, or gases Substances in a mixture retain their identity Mixtures can be physically separated The components of a mixture do not have a definite ratio 2. 3. 4. Types of Mixtures: 1. Heterogeneous Mixture: Mixture that does not appear to have same properties throughout. Examples: Salad dressing, sand and salt mixture, cement (sand and rock mixture) 2. Homogeneous Mixture: Mixture that appears to have the same properties throughout. Examples: Milk and Jello. 3. Solution: A type of homogeneous mixture formed when one substance is dissolved in another. Examples: Sea Water or tea with sugar. 4. Solute: The substance that is dissolved in a solution Examples: Sugar, salt, or carbon dioxide in soda. 5. Solvent: The substance that does the dissolving Example: Water 6. Solubility: The amount of solute that can be completely dissolved in a given amount of solvent. 7. Soluble: A substance that can be dissolved 8. Insoluble: A substance that will NOT be dissolved 9. Alloy: A solution of 2 metals or a metal and non metal that has properties of metal. Examples: Jewelry: Gold mixture with Silver Brass: Copper with zinc used in doorknobs, banisters, pipes, and instruments.
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