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Dodgers win again. Cubs choke Nice pick Alex. Heterogeneous Mixture. Mixtures do not always contains the same proportions of the substance that make them up. A mixture in which different materials can be distinguished easily is called a heterogeneous mixture. Example:.
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Dodgers win again Cubs choke Nice pick Alex
Heterogeneous Mixture Mixtures do not always contains the same proportions of the substance that make them up. A mixture in which different materials can be distinguished easily is called a heterogeneous mixture.
Example: • Example – Granite rock, concrete, and dry soup. Also, you could pick off the pizza toppings that you don’t like.
More Examples: • The clothes you wear, such as your jeans, shirts, or any material that contains 2 or more fibers. • Example: Cotton and Polyester. • Some heterogeneous mixtures we can see, but some we don’t see.
Example • Example: cheese – It is made of milk, proteins, butterfat, colorings and food additives.
Homogenous • A homogeneous mixture contains two or more gases, liquids, or solid substances blended evenly throughout.
Examples • Examples: • Soda • Vinegar
Extra • Another name for a homogenous mixture is a solution. • A solution is a homogenous mixture of particles so small that they cannot be seen with a microscope and will never settle to bottom of their container.
Colloids • A colloid is a type of mixture that never settles. Its particles are larger then those in a solution buy not heavy enough to settle. • In Greek, the word colloid means “glue”. *A colloid is a homogenous mixture* (write that in your notes)
Examples of Colloids • Milk – water, fats, and proteins • The first colloids studied were in a gelatin. • Paints are colloids, • Fog and smoke – thick gases mixed with different particles that don’t settle.
Detecting Colloids • One way to distinguish a colloid from a solution is by its appearance. • Fog appears white because its particles are large enough to scatter light.
The light test • You can tell for certain if a liquid is a colloid by passing a beam of light through it. • A light beam is invisible as it passes through a solution, but can be seen readily as it passes through a colloid.
The scattering • The scattering of light is called the Tyndall Effect.
Suspensions • Some mixtures are neither solutions nor colloids. A suspension, which is a heterogeneous mixture contains a liquid in which the particles never settle to the bottom.
Example • Pond water • River Deltas
