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Chapter 1
Chapter 1 Chemistry Flash Cards
23
Chemistry
10th Grade
02/25/2013

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Term
Law of Conservation
Definition
The total mass remains constant during a chemical change
Term
Chemical reaction that illustrates Law of Conservation
Definition
Mercury + oxygen yields mercury || oxide
Term
Solids
Definition
Form of matter characterized by rigidity; relatively incompressible and has fixed shape and volume
Ex. Metal
Term
Liquids
Definition
Form of matter that is a relatively incompressible fluid; a liquid has a fixed volume but no fixed shape
Ex. Water
Term
Gas
Definition
Form of matter that is an easily compressible fluid; a given quantity of gas will fit into a container of almost any size & shape
Ex. Oxygen
Term
Physical Property
Definition
A characteristic that can be observed for a material without changing its chemical identity
Ex. Color, Size, Shape
Term
Chemical Property
Definition
A characteristic of a material involving its chemical change
Ex. Heat combustion, reactivity, PH factor
Term
Physical Change
Definition
A change in the form of matter but not in its chemical identity
Ex. melting an ice cube & breaking a bottle
Term
Chemical Change
Definition
A change in which one or more kinds of matter are transformed into new matter or several kinds of new matter
Ex. Rusting of Iron & Burning of wood
Term
Pure Substance
Definition
A sample of matter with both definite and constant composition with distinct chemical properties
Ex. Water, Diamond, Gold
Term
Impure Substance
Definition
A substance that has been contaminated with other materials that differ in chemical composition
Term
Elements
Definition
A substance that cannot be decomposed by any chemical reaction into simpler substances
Ex. Iodine, Magnesium, & Mercury
Term
Compounds
Definition
A substance composed of 2 or more elements chemically combined
Ex. Water, Hydrogen Peroxide, Sodium Chloride (salt)
Term
Mixtures
Definition
A material that can be separated by physical means into 2 or more substances
Term
Heterogeneous Mixtures
Definition
A mixture that consists of physically distinct parts, each with different properties
Term
Homogeneous Mixtures
Definition
A mixture that is uniform in its properties throughout given samples
Term
Intensive Property
Definition
A physical property of a system that does not depend on the system size or the amount of material in the system
Ex. Color & Hardness
Term
Extensive Property
Definition
A physical property of a system that is directly proportional to the amount of material in the system
Ex. Weight & Length
Term
Chromatography
Definition
A group of similar separation techniques. Each technique depends on how fast a substance moves, in a stream of gas or liquid, past a stationary phase to which the substance is slightly attracted
Term
Paper Chromatography
Definition
Generally used for identifying components of colored mixtures, such as M&Ms. Using paper to absorb different pigments
Term
Column Chromatography
Definition
Used if one has a solution containing substances that need to be separated. Pour mixture through column containing powdered chalk, then add pure liquid. Substances will begin to separate
Term
Gas Chromatography
Definition
Moving stream is a gaseous mixture of vaporized substances, along with another gas (ex. helium) which is the carrier. Stationary material is either a solid, or a liquid adhering to a solid, within a column. As gas goes through the column, different vaporized substances are attracted to the carrier.
Term
How would Chromatography be used in a lab situation?
Definition
You could use paper Chromatography to separate M&M dye to find out its components for different colors.
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