Chapter 8 Flashcards
(14 cards)
What is a chemical reaction?
A process that transforms one or more substances into different substances.
What does the law of conservation of mass state?
the total mass of reactants must equal the total mass of products for any given chemical reaction.
What does a chemical reaction represent?
It shows the reactants and products in a reaction using symbols and amounts.
What are the characteristics of a chemical equation?
-The law of conservation of mass must be satisfied.
-The equation must represent known facts.
-The equations must contain correct formulas.
Slide 8-11
Slide 14
How do you balance a chemical equation?
-need to make the reactants be the same exact number as your product.
-Balance everything except hydrogen and oxygen first; leave hydrogen and especially oxygen for last.
What are the types of chemical reactions?
1) Synthesis
2) Decomposition
3) Single displacement
4) Double displacement
5) Combustion
What is a synthesis reaction?
When two or more elements to form a compound.
(Element + Element = Compound).
What is a decomposition reaction?
when a compound breaks down into smaller elements, often requiring energy in the form of heat or electricity.
What is a single displacement reaction?
-When an element and Compound form to make another element and
Compound.
-One element replaces a similar element in a compound.
What is a double displacement reaction?
Ions from two compounds exchange places in an aqueous solution, forming new compounds, often with a precipitate, insoluble gas or a molecular compound usually water.
What is a combustion reaction?
When a substance reacts with oxygen, releasing a large amount of energy in the form of light and heat.
What are the types of single displacement reactions?
1) Displacement of a
Metal in a compound
by another Metal.
2) Displacement of
Hydrogen in Water by
a Metal.
3) Displacement of
Hydrogen in an Acid
by a Metal.
4) Displacement of
Halogens.
What are the types of single displacement reactions?
1) Displacement of a
Metal in a compound
by another Metal.
2) Displacement of
Hydrogen in Water by
a Metal.
3) Displacement of
Hydrogen in an Acid
by a Metal.
4) Displacement of
Halogens.
