Types of reactions Flashcards
(26 cards)
What is a chemical reaction?
A process that involves the rearrangement of the molecular or ionic structure of a substance.
True or False: In a chemical reaction, atoms are created or destroyed.
False. Atoms are neither created nor destroyed in a chemical reaction.
Fill in the blank: A __________ reaction is one where two or more substances combine to form a single product.
synthesis
What is the main characteristic of a decomposition reaction?
A single compound breaks down into two or more simpler substances.
Which type of reaction involves the exchange of ions between two compounds?
double displacement reaction
What is the formula for a combustion reaction?
Fuel + O2 → CO2 + H2O
True or False: Combustion reactions always produce carbon dioxide and water.
True.
What happens in an oxidation-reduction (redox) reaction?
One substance is oxidized (loses electrons) and another is reduced (gains electrons).
Fill in the blank: In a __________ reaction, an acid reacts with a base to produce salt and water.
neutralization
What is the general form of a single displacement reaction?
A + BC → AC + B
What type of reaction occurs when two or more reactants form a single product?
synthesis reaction
True or False: A catalyst is a substance that speeds up a chemical reaction without being consumed.
True.
What is an example of a physical change?
Melting ice into water.
In a __________ reaction, energy is absorbed from the surroundings.
endothermic
What is the main difference between exothermic and endothermic reactions?
Exothermic reactions release energy, while endothermic reactions absorb energy.
What are reactants?
Substances that undergo a chemical change in a reaction.
Fill in the blank: The __________ of a reaction is the amount of product formed when the reaction goes to completion.
yield
Which type of reaction is represented by the equation AB + CD → AC + BD?
double displacement reaction
What is the role of a reagent in a chemical reaction?
A reagent is a substance used to cause a chemical reaction.
True or False: All chemical reactions are reversible.
False.
What is the purpose of balancing a chemical equation?
To ensure that the number of atoms for each element is the same on both sides of the equation.
Fill in the blank: __________ reactions involve the breakdown of a compound into simpler substances.
Decomposition
What is an example of a synthesis reaction?
The formation of water from hydrogen and oxygen.
What does the term ‘activation energy’ refer to?
The minimum energy required for a reaction to occur.
