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45 Cards in this Set
- Front
- Back
Chemistry
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The science that deals w/ the materials of the universe and the changes that these materials undergo
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Matter
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Anything that has mass and occupies space
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Solid
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Rigid and has fixed vol and shape
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Liquid
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Definite volume but no definite shape
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Gas
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No definite volume or shape
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Extensive
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It depends upon amt of matter present (mass)
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Intensive
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Does not depend on matter that is present (boiling point)
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Physical Property
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A characteristic that can be obsierved without changing the identity of the substance.
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Physical Change
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A change in the substance that does not involve the change in the identity of the substance
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Chemical Property
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A substance's ability to undergo changes that will transform it into a new substance
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Chemical change
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A change in which one or more substances are converted into different substances
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mixture
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Variable composition
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Homogeneous Mixtures
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Same throughout (solution)
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Heterogeneous Mixtures
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Contains regions that have different properties from those of other regions
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Pure substance
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Always has the same composition
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E lements
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Cann not be decomposed into simpler substances by chemical or phhysical means Ex. Carbon
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Compounds
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A cmpound can be broken down into elements by chemical means (water, ozone)
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5 physical, 5 Chemical Examples
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Physical: Breaking, Bending, cutting, boiling, freezing
Chemical: Egg, Burning, Digesting, Rusting, tarnishing? |
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Organic
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Carbon-Containing
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Inorganic
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Non organic compounds, not carbon containing
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Physical
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Properties, changes, and relationships between energy and matter
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Analytical
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Identification of components and composition of materials
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Biochem
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the study of substances and processes occuring in living things
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Theoretical chem
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Use of mathematics and comps to design and predict properties of new compounds
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Basic Research
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Used for obtaining info, obtaining the properties of teflon
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Applied Research
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Used for solving a specific problem, new compounds to replace refrigerants in the ozone
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Technological development
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Used for creating new products, , computers
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Chemical
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Any substance that has a definite composition
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Volume
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Amount of 3 dimensional space an object occupies
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Mass
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A measure of the amount of matter
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Matter
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Anything taking up space and having mass
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Atom
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The smallest unit of an element that maintains the properties of that element
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Element
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A pure substance made of only 1 kind of attom
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Compound
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A substance made from the atoms of 2 or more elements that are chemically bonded
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Molecule
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smallest unit of an element or compound that retains all of the properties of that element or compound
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Change of sate
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Is the physical change of a substance from one state to another
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Law of conservation of energy
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After using energy, its not destroyed or recreated, it just takes another form
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Difference of mixtures from pure substances
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1. Every sample of a given pure sub has exactly the same characteristic properties
2. Every sample has the exactly the same composition |
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Order of grades
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Technical, FCC, NF, CP/USP, ACS
Fcc= food chem code NF=national formulary CP= chemically pure USP= US pharmacopoeia ACS=American Chem society |
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Hand seperation
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Uses diff sizes to its advantage, uses one's hand to take apart
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Filtration
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Uses filter paper, residue= stuff left in funnel
filtrate=smaller particles |
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Seperating funnel
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uses ;solubility' need 2 non mixing liquids, open bottom, let out, discard middle, etc
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distillation
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different boiling points, heat to vapor, go in tube, condense,
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Centrifuge
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uses mass and centrifugal foce
spins, take solvent that dissolves b, thake, take out |
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chroma tography
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used to seperate inks
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