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PS Chemical Rxns

Review of the parts of a chemical reaction

starting material in a chemical reaction reactants
ending material in a chemical reaction products
speed up a chemical reaction in nonliving things catalyst
reaction that releases energy exothermic
reaction that absorbs energy endothermic
compounds that must contain Carbon atoms organic compound
compounds that do not contain Carbon atoms inorganic compound
means "reacts" ; type of arrow that shows the chemical reaction is NOT reversible single arrow
NEVER EVER change this number to balance a chemical equation subscript
ALWAYS change this number to try and balance a chemical equation coefficient
means "reacts" ; type of arrow that shows the chemical reaction is reversible double arrows (equilibrium)
a chemical equation that has equal numbers of each element on both sides balanced
a chemical equation that has unequal numbers of each element on both sides skeleton
this is conserved (saved) in every chemical reaction number of atoms & mass
the sum of the atomic masses in a compound; usually expressed in grams molar mass
use this coefficient if you don't want any changes to number of atoms one
TRY this type of coefficient if you need to get rid of an odd subscript even number
this says that mass is not created or destroyed in any chemical reaction law of conservation of mass
AB --> A + B ( always 1 to 2 or more ) decomposition
AB + C ---> CB + A single replacement
A + B --> AB (always 2 or more to 1 ) synthesis (combination)
AB + CD --> AD + CB double replacement
final products of a combustion reaction CO2 + H2O
this term is for elements that always have 2 atoms of itself when by itself diatomic
formula that tells you the type and number of atoms in a compound; may or may not be in lowest terms molecular
formula that is ALWAYS written in lowest ratio of atoms empirical
the reactants of a combustion reaction CxHy + O2
the 2 possible products of a double replacement reaction (2 compounds) salt and/or precipitate
the 2 products of a single replacement reaction compound and element
Double replacement reactions happen what % of the time 100%
Single replacement reactions happen what % of the time 50%
method for finding the charge of polyatomic ions in a compound reverse criss-cross
examples of diatomic elements N, H, Br, I, Cl
Created by: cadetjt