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Ty Psy Sci Ch 14

Chemical Reactions

QuestionAnswer
the process by which one or more substances undergo change to produce one or more different substances that have different chemical and physical properties from the original chemical reaction
a shorthand notation for a compound or a diatomic element using chemical symbols and numbers chemical formula
a shorthand description of a chemical reaction using chemical formulas and symbols chemical equation
the starting materials in a chemical reaction reactants
the substances formed from a reaction products
states that mass is neither created nor destroyed in ordinary chemical and physical changes law of conservation of mass
What are some clues that a chemical reaction is occurring? gas formation, solid formation, color change, energy change
Write the chemical formulas for carbon tetrachloride and calcium bromide CCl4 and CaBr2
Explain how a balanced chemical equation illustrates that mass is never lost or gained in a chemical reaction. it shows the same number and type of atoms in both the reactants and the products; so the total mass of all the atoms in the reactants is the same as the total mass in the products
a reaction in which two or more substances combine to form a single compound synthesis reaction
a reaction in which a single compound breaks down to form two or more simpler substances decomposition reaction
a reaction in which a single compound breaks down to form two or more simpler substances single-replacement reaction
a reaction in which ions in two compounds switch places double-replacement reaction
Which type of reaction always has an element and a compound as reactants? single replacement
a chemical reaction in which energy is released or removed exothermic
a chemical reaction in which energy is absorbed endothermic
states that energy can neither be created nor destroyed law of conservation of energy
the minimum amount of energy needed for substances to react activation energy
a substance that speeds up a reaction without being permanently changed catalyst
a substance that slows down or stops a chemical reaction inhibitor
List four ways to increase the rate of a reaction. raise the temperature, increase the concentration or the surface area of a reactant, add a catalyst
Created by: beth2244
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