a statement using chemical formulas to describe the identities and relative amounts of the reactants and products involved in the chemical reaction.
the process by which the atoms of one or more substances are rearranged to form different substances; occurrence can be indicated by changes in temperature, color, odor, and physical state.
in a chemical equation, the number written in front of a reactant or product in a balanced equation describes the lowest whole-number ration of the amounts of all reactants and products.
a substance formed during chemical reactions
the starting substance in a chemical reaction
a chemical reaction that occurs when a substance reacts with oxygen, releasing energy in the form of heat and light.
a chemical reaction that occurs when a single compound breaks down into two or more elements or new compounds
a chemical reaction that involves the exchange of ions between two compounds and produces either a precipitate, a gas, or water.
a solid produced during a chemical reaction in a solution
a chemical reaction that occur when the atoms of one element replace the atoms of another element in a compound
a chemical reaction in which two or more substances react to yield a single product.
a solution in which the solvent is water
complete ionic equation
an ionic equation that shows all the particles in a solution as they realistically exist
net ionic equation
an ionic equation that includes only the particles that participate in the reaction
one or more substances dissolved in a solution
ion that does not participate in a reaction
the substance the dissolves in a solute to form a solution; the most plentiful substance in the solution
lighting a match
What is an example of a chemical reaction?
are found on the right hand side of the equation for the reaction
In chemical reactions, the products _____
the products contain different elements than the reactants
What is NOT true about a chemical reaction?
the kinds of atoms remain the same
how are chemical changes like physical changes?
matter is created
carbon dioxide, sodium acetate, and water form when sodium bicarbonate and acetic acid react. Even though three products form from two-reactants it is wrong to conclude that ____
the law of conservation of mass means that matter cannot be created or destroyed but it can be rearranged
energy is absorbed
in an endothermic reaction, the temperature decreases because ______
in a chemical reaction a new substances is _____
chemical reactions are also called ________
temperature change, release of energy in form of heat/light, absorption of energy
evidence of chemical reactions are...
what represents chemical reactions?
what is present before the reaction?
what is left after the reaction?
shows the chemical change, reads as "yields" or "produces"
a _______ is put when there is more than on reactant or product
statements which use words to describe a chemical reaction
in skeleton equations use ________ rather than words to show reactants and products
law of conservation of mass
a skeleton equation is incorrect since it doesn't observe the _______________
the equation must show that the number of atoms of each reactant and product is _____ on both sides of the arrow
this is done by adding _______ in front of the reactants or products
synthesis, combustion, decomposition, single replacement, double replacement
types of reactions?
A + B --> AB
combustion reaction is a type of _____ reaction with oxygen by itself on the left
2H + O --> 2HO
opposite of synthesis
AB --> A + B
1 compound breaks into its parts with plus signs in between
A + BX --> AX + B
AX + BY --> AY + BX