Basics
A description of a reaction using element symbols and chemical formulas.
What is a chemical equation?
(any substance)+O2→substance(s)
What is combustion?
A ______ is a type of change in matter in which new substances are not formed.
What is a physical change?
Decomposition reactions
What is the opposite of synthesis?
These are found on the left side of the equation and can be either elements or compounds.
What are reactants?
Synthesis, decomposition, replacement, and combustion.
What are the four main types of chemical reactions?
The presence of bubbles is an example of a sign of a chemical reaction, but the only sure way to know if a chemical reaction has taken place is if new ______ are formed.
What are substances?
An ______ reaction is a chemical reaction that absorbs thermal energy.
What is endothermic?
These are found on the right side of the equation and can be either elements or compounds.
What are products?
A+B→AB
What is synthesis?
A substance that slows down or stops a chemical reaction.
What is an inhibitor?
An _____ reaction is a chemical reaction that releases thermal energy.
What is exothermic?
The element symbols and subscript numbers showing how many of each element are combined in a compound.
What is a chemical formula?
AB→A+B?
What is decomposition form?
A substance that lowers the activation energy of a reaction and increases the reaction rate.
What is a catalyst?
If a chemical equation is unbalanced, we must add reactants, products, or both until it becomes _____.
What is balanced?
Increasing the surface area of a reactant that is a solid, increasing the temperature of reactants, increasing the concentration of reactants, or increasing the pressure of reactants which are gases.
What are ways to increase the rate of a chemical reaction?
AB+C→AC+B
What is single replacement form?
The law that states: in a chemical equation, the mass of the products is always equal to the mass of the reactants.
What is the law of conservation of mass?
In order to determine if a chemical equation is _____________, we have to check if the number of atoms of each type of element are the same on both sides of the equation.
What is balanced or unbalanced?