Matter MIXTURES HOMOGENEOUS AND HETEROGENEOUS MIXTURES Matter Mixtures

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Matter MIXTURES: HOMOGENEOUS AND HETEROGENEOUS MIXTURES

Matter MIXTURES: HOMOGENEOUS AND HETEROGENEOUS MIXTURES

Matter – Mixtures Review A mixture: §is made from different pure substances (elements, compounds,

Matter – Mixtures Review A mixture: §is made from different pure substances (elements, compounds, or both) that are not chemically joined §is held together by physical forces, not chemical §can be separated physically (filtration, evaporation, distillation) § examples: ocean water, air, soil, vegetable soup

Matter – Mixtures § Most substances that you find in nature, as well as

Matter – Mixtures § Most substances that you find in nature, as well as most human-made substances, are mixtures of one or more pure substances. § Mixtures can be classified as either homogeneous or heterogeneous. § The difference between a homogeneous mixture and a heterogeneous mixture is how well the materials are mixed together and how uniform its composition is.

Matter – Homogeneous Mixtures A homogeneous mixture: § has a uniform appearance; it looks

Matter – Homogeneous Mixtures A homogeneous mixture: § has a uniform appearance; it looks the same throughout § has a uniform composition; it’s made of the same types of particles § all the substances that make up the mixture are evenly distributed § it can be separated physically

Matter – Homogeneous Mixtures - Solutions One type of homogeneous mixture is a solution:

Matter – Homogeneous Mixtures - Solutions One type of homogeneous mixture is a solution: § a mixture made of two or more pure substances § the particles that make up a solution are too small to be seen § examples: salt water, tea, mouthwash, air, alloys (mixture of different metals)

Matter – Homogeneous Mixtures - Solutions A solution is formed when one substance dissolves

Matter – Homogeneous Mixtures - Solutions A solution is formed when one substance dissolves in another substance: § solute – the substance that dissolves § solvent – the substance that does the dissolving § the solvent dissolves the solute § there is usually more solvent than solute § example: salt (solute) dissolves in water (solvent)

Matter – Homogeneous Mixtures - Solutions

Matter – Homogeneous Mixtures - Solutions

Matter – Heterogeneous Mixtures A heterogeneous mixture: § consists of visibly different substances or

Matter – Heterogeneous Mixtures A heterogeneous mixture: § consists of visibly different substances or states of matter § substances remain separate § the different substances in the mixture can typically be separated easily § examples: iced tea (solid ice and liquid tea), pizza, blood, cereal in milk

Matter – Heterogeneous Mixtures: Suspensions One type of heterogeneous mixture is a suspension: §

Matter – Heterogeneous Mixtures: Suspensions One type of heterogeneous mixture is a suspension: § made of larger, visible particles that do not dissolve § solid particles will settle and separate over time if left alone § examples: pulpy orange juice, tomato juice, sand in water, Chex Mix

Matter – Heterogeneous Mixtures: Suspensions

Matter – Heterogeneous Mixtures: Suspensions