Unit 4 Flashcards
the substances you start with
reactants
the substances you end up with (new substances
are formed)
products
atoms cannot be created or destroyed
Law of Conservation of Mass
Law of Conservation of Mass
atoms cannot be created or destroyed
All the atoms we start with we must end up with
Law of Conservation of Mass
A balanced equation has the same number of each element
on both sides of the equation. Atoms are rearranged to
form new substances.
Law of Conservation of Mass
rusting iron + burning wood
chemical reaction
color, shape, state of matter, shape, mass
Physical Properties
bonds of the reactants are broken, and bonds of the product are formed
during a chemical reaction
what type of reaction is
xa+b -> xb+a
single replacement
burning wood, frying and egg, rusting metal, digesting food
Chemical Changes
-Unexpected color change
New odor
Gas bubbles
Light production
-An increase or decrease in temperature
(exothermic/endothermic)
Precipitate (formation of a solid)
signs of a chemical change
the construction of complex chemical compounds from
simpler ones (A + X -> AX)
synthesis
atoms are rearranged during what type of reaction?
during a chemical reaction
chemical equations must be balanced in order to comply with what scientific law
the of conservation of mass
processes in which chemical species break up into
simpler parts (AX -> A + X)
decomposition
which of the following types of reactions takes 2 substance and combines them to create 1 new substance
synthesis
which is not an indication that a chemical change has taken place
an objects is split into two equal halves
A+B -> AB is what???????
synthesis
reactants on the…
products on the….
r-left
p-right
a chemical reaction in which one element
replaces another in a compound (AX + B -> BX + A)
single replacement
two ionic compounds that are exchanging anions
or cations (AX + BY -> AY + BX)
double replacement
an equation is balanced by…
changing or adding coefficients
what cannot be changed when balancing equations
subscripts
