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Chemistry

Chemical Reactions

TermDefinition
Chemical Reactions a process in which the physical and chemical properties of the original substances change as new substances with different chemical and physical properties are formed
The properties and energies of the substances always change when, a chemical reaction take place
Reactant substance that enters into a chemical reaction, a starting substance in a chemical reaction
Product a substance formed or produced by a chemical reaction
Coefficient the big number in front of symbols/formula
What does the arrow mean? yields or produces
Exothermic energy is given off (something that is burning or gives off light)
Endothermic energy is absorbed (photosynthesis or test tube gets colder)
Activation Energy the energy needed to form short-lived, highly energetic, extremely unstable, intermediate molecules that are rearranged to form products in the chemical reaction
In order for a chemical reaction to occur the reactants must have the ability to combine with substances to form products
An atom bonds with another atom to complete its outermost energy level
Atoms can be neither created nor destroyed
Evidence Of Chemical Reaction ~precipitate produced ~unexpected color change ~light emitted ~gas released/bubbles ~energy change ~temp increase/decrease due to absorption or release of heat
Catalyst substance that speeds up the rate of a reaction but is not used up in the reaction
All metals are singular
Non noble gases are diatomic
The diatomic gases are N2, O2, F2, Cl2, Br2, I2, H2
How many types of basic chemical reactions are there? 5
What are the five reactions? combination (synthesis) decomposition single replacement double replacement combustion
Synthesis sometimes called combination, two or more simple substances combine to form a new, more complex substance
Metallic oxides react with water to form bases
Decomposition a complex substance breaks down into two or more simpler substances
Combustion also called an oxidation reaction
Single Displacement one element replaces another element in a compound
Double Displacement different atoms in two different compounds replace each other
Aqueous whenever something is dissolved in water
Precipitate insoluble solid that separates form solution
Net Ionic Equation a chemical equation that involves compounds dissolved in water
Net Ionic Equation Shows all the soluble ionic solutions as ions
Spectator Ions there are ions that do not take part in a chemical reaction and are found in solution before the reaction and after they do not participate
Molecular two nonmetals bonded together cannot dissociate into ions
Ionic metal + nonmetals contains polyatomic ions, always dissociate into ions if aqueous
Created by: jordinlevy