All Flashcards
What is the key difference between physical and chemical changes?
Physical changes alter form, chemical changes create new substances.
Compare and contrast synthesis and decomposition reactions.
Synthesis combines reactants into one product; decomposition breaks one reactant into multiple products.
What is the main difference between single and double replacement reactions?
Single replacement involves one element swapping; double replacement involves two compounds exchanging ions.
Define a physical change.
Alters the form of a substance but not its chemical identity.
Define a chemical change.
Results in the formation of new substances with different chemical properties.
What are reactants?
Substances that react (left side of the equation).
What are products?
Substances formed in a chemical reaction (right side of the equation).
Define a synthesis reaction.
Two or more reactants combine to form a single product.
Define a decomposition reaction.
A single reactant breaks down into two or more products.
What is a combustion reaction?
A reaction involving organic molecules reacting with oxygen to produce CO2 and H2O.
Define a single replacement reaction.
An element replaces another element in a compound.
Define a double replacement reaction.
Ions are exchanged between two compounds.
What is the general form of a synthesis reaction?
A + B → AB
What is the general form of a decomposition reaction?
AB → A + B
What is the general form of a combustion reaction?
Hydrocarbon + O2 → CO2 + H2O
What is the general form of a single replacement reaction?
AB + C → AC + B
What is the general form of a double replacement reaction?
AB + CD → AD + CB