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Chapter 21
Question | Answer |
---|---|
Balanced Chemical Equation | The same number of atoms on both sides of the equation. |
Catalyst | A substance the speeds up a chemical reaction without completely changing itself. |
Chemical Equation | A way to describe a chemical reaction using chemical formulas and other symbols. |
Chemical Reaction | A change is which one or more substances are converted into new substances. |
Coefficient | Represent the number of units of each substance taking part in each substance. |
Combustion Reaction | Occurs when a substance reacts with oxygen. |
Decomposition Reaction | Occurs when one substance breaks down, decomposes, into two or more substances. |
Double Displacement Reaction | The positive ion of one compound replaces the positive ion of the other to form two new compounds. |
Endergonic Reaction | Sometimes a chemical reaction requires more energy to break bonds than is released when new ones are formed. |
Endothermic Reaction | When the energy needed is in the form of thermal energy. |
Exergonic Reaction | Less energy is needed to break the original bonds than is released when new bonds form. |
Exothermic Reaction | When the energy given off is primarily in the form of thermal energy. |
Inhibitor | Used to slow down chemical reactions. |
Oxidation | Describes the loss of electrons. |
Precipitation | An insoluble compound that comes out of solution during this type of reaction. |
Product | New substances produced. |
Reactant | New substances that react. |
Reduction | Describes the gain of electrons. |
Single-displacement Reaction | When one element replaces another element in a compound. |
Synthesis Reaction | Two or more substances combine to form a new substance. |