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Chemistry Unit 4

Unit 4: Stoichiomtry I

QuestionAnswer
Chemical Equation Symbolic representation of a chemical reaction
Phase State Symbols Represent the state of matter the reactant/product is in
Coefficient Big number in the front (can be changed)
Subscript A number that is smaller and below the normal line (can't be changed)
Gas g
Solid s
Pure Liquid l
Aqueous Solution aq
Single Displacement 1 element displaces another in a compound (element + compound -> element + compound)
Double Displacement 2 elements in different compounds switch places (compound + compound -> compound + compound)
Decomposition Compound breaks down into 2 or more simpler substances (compound -> 2 or more elements/compounds)
Synthesis 2 or more substances combine to form a more complex compound (element/compound + element/compound -> compound)
Combustion Exothermic process that involves reaction of a substance with oxygen gas (element/compound +O2 -> oxide compound)
Combustion w/hydrocarbons This is a special type of combustion involving hydrocarbons (hydrocarbon + oxygen -> CO2 + H2O)
Theoretical Yield The amount of product calculated to be formed using stoichiometry.
Experimental Yield The amount of product that forms when the reaction is carried out in the lab.
Percent Yield Experimental Yield/Theoretical Yield x 100 (Theoretical Yield > Experimental Yield)
Limiting Reactant The reactant that limits how many products can be formed.
Stoichiometry The study of the amounts of substances involved in chemical reactions
Created by: sara!
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