chemistry - chapter 6 Flashcards
chemicals and their reactions
chemical reaction
a process in which substances interact, causing the formation of new substances with new properties
word equation
a way of describing a chemical reaction using the names of the reactants and products
chemical equation
a way of describing a chemical reaction using chemical formulas of the components
reactant
a chemical, present at the start of a chemical reaction that is used up during the reaction
product
a chamiecal that is produced during a chemical reaction
what do you add at the end of a word equation
+ energy
what does the arrow in a chemical equation mean
yields or produces
law of conservation of mass
in any given chemical reaction, the total mass of the reactants equals the total mass of the products
( mass of reactants = mass of products )
an equation without balancing is called
a skeleton question
synthesis
a reaction in which two reactants combine to make a larger or more complex product
synthesis general pattern
A + B –> AB
decomposition
a reaction in which a large or more complex molecule breaks down two or more simpler products
decomposition pattern
AB –> A + B
what is the opposite of synthesis
decomposition
in a decompositon reaction, the energy goes
on the left or with the reactants
single displacement
a reaction in which an element displaces another element i a compound creating a new compound and a new element
single displacement pattern
A + BC –> AC + B
single displacement reactions often happen in
aqueous solutions
double displacement
a reaction that occurs when elements in different compounds displace each other or exchange places, producing two new compounds
double displacement pattern
AB + CD –> AD + CB
precipitate
a solid formed from the reactions of two solutions
precipitates happen when
a compound is created that is insoluble in water
combustion
the rapid reaction of a substance with oxygen to produce oxides and energy; burning
common products of combustion
an oxide and energy
