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21 Cards in this Set
- Front
- Back
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Chemical Reaction
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The process by which one or more substances change to produce one or more different substances, properties from the original substances.
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Gas Formation
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The formation of bubbles may show that a reaction is happening. A clue to a chemical reaction.
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Solid Formation
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The formation of a solid may show that a reaction is happening. A clue to a chemical reaction.
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What are four clues to a chemical reaction?
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Gas Formation, Solid Formation, Energy Change, Color Change.
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Precipitate
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A solid formed in a solution as a result of a chemical reaction.
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Chemical Formula
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A shorthand notation that uses chemical symbols and numbers to represent a substance.
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Subscript
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A number written below and to the right of a chemical symbol in a formula.
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Chemical Equation
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Uses chemical formulas as a shorthand description of a chemical reaction.
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What are the 4 parts of a chemical equation?
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Reactant, plus sign, products, arrow.
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Reactants
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The starting materials in a chemical reaction.
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Products
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The substances formed from a reaction.
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Coefficient
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A number placed in front of a chemical symbol or formula.
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Law of Conservation of Mass
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This law states that mass is neither created nor destroyed in ordinary chemical and physical changes. A chemical equation must show the same number and kind of atom on both sides of the arrow.
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Exothermic
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A chemical reaction in which energy is given off.
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Endothermic
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A chemical reaction in which energy is absorbed.
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The law of conservation of energy
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States that energy can be neither created nor destroyed.
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Activation Energy
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The smallest amount of energy needed for substances to react.
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What are 4 factors that affect rates of reactions?
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1. Temperature
2. Concentration 3. Surface Area 4. Catalysts and Inhibitors |
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Concentration
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A measure of the amount of one substance dissolved in another.
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Catalyst
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A substance that speeds up a reaction without being permanently changed.
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Inhibitor
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A substance that slows down or stops a chemical reaction.
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