Air is a mixture Mixtures 2 or more

2 types of mixtures (Homogeneous or heterogeneous) 1) Heterogeneous *not well mixed *does not

2) Homogeneous Mixture • Appears the same throughout • Is well mixed • can

Types of Homogeneous mixtures • A) solutions • B) colloids • C) suspensions

A) Solutions • When one substance dissolves in another • 2 parts solute and

Alloys • Metal solutions • EX: • Sterling silver is silver with small amounts

B) Colloids • Colloids are solutions. They can be described as a substance trapped

c) Suspensions • The size of the particles is great enough so they are

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Air is a mixture Mixtures 2 or more substances mixed together but not chemically combined

2 types of mixtures (Homogeneous or heterogeneous) 1) Heterogeneous *not well mixed *does not appear the same throughout. • easily separated by physical means (filtering, magnets) Examples: fruit salad, vegetable soup, Granite}

2) Homogeneous Mixture • Appears the same throughout • Is well mixed • can be separated by physical means • EX: milk, air, suntan lotion, paint, clouds, lemonade

Types of Homogeneous mixtures • A) solutions • B) colloids • C) suspensions

A) Solutions • When one substance dissolves in another • 2 parts solute and a solvent *solute is the substance that is dissolved *solvent substance that does the dissolving

Alloys • Metal solutions • EX: • Sterling silver is silver with small amounts of Copper dissolved in it • Stainless Steel is iron and chromium

B) Colloids • Colloids are solutions. They can be described as a substance trapped inside another substance. They can be identified by their characteristic scattering of light. • do not separate on standing • Mixed together but not dissolved • EX: Milk is a colloid of butter fat globules dispersed within a water based liquid

c) Suspensions • The size of the particles is great enough so they are visible to the naked eye. • Blood and aerosol sprays are examples of suspensions.