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matter, mixtures, ˛˛ - Coggle Diagram
matter
chemical change
Changes that produces matter with different composition
Decomposition of compounds into elements is a chemical change
Properties of compounds are often very different than individual elements
how to know
Energy change , Light or heat given off or taken in, Oder changes, Bubbles produced, Color change, and Precipitate formed-solid in solution
phyical change
change where properties of the material change but the identity doesn’t
melting, boiling, sanding wood reversible if can be redone - refreeze an ice cube
irreversible mean they can’t go back - mowing the lawn
pure substances
matter that has a uniform and definite composition
Simplest forms of matter with unique properties
Found on periodic table
Compound- Two or more elements chemically combined in a fixed ratio Methane, water, sugar
chemical reaction
Another same for chemical change
escribe the substances and what happens to them in the chemical changes
Chemical equation
Writes out whats going on
zinc + sulfur-> zinc sulfide
parts
reactants - starting substances
Product- new substances mad by chemical change
phical proprty
color, hardness, malleability (molded into sheets), solubility, electrical conductivity, magnetism, density, melting point, boiling point
characteristic of a substance that can be observed or measured without changing the substance
Extensive
depends on the amount
mass and volume
Intensive property
depends only on the type of matter
electrical conductivity, color, temperature, density
chemical property
Describes the ability of a substances to undergo a specific chemical change
chemical
anything that has mass and takes up space
mass- amount of matter in an object
volume - space that is occupied by an object
mixtures
homogeneous mixture
Composition is uniform throughout
Air, salt /sugar water, and Brass
Composition is not uniform throughout the mixture
Contains two or more phases, Part of a sample that has a uniform composition and properties
seperation
Filtration- Technique that uses a porous barrier to separate a solid from a liquid
Distillation- Technique that is based on differences in the boiling points of the substances involved
Crystallization-Technique that results in the formation of pure solid particles of a substances containing the dissolved substances
Chromatography- Technique that separates the components of a mixture on the basis of the tendency of each to travel or be drawn across the surfaces of another material
Blend of two or more pure substances which retain the properties
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