Chapter Review Chemical Reactions

Questions and Answers

What is a chemical reaction?

A change in which one or more substances are converted into new substances. (correct)

A type of physical change.

The freezing of a substance.

The mixing of two solutions.

What occurs in a double-displacement reaction?

A precipitate, water, or a gas forms when two ionic compounds in solution are combined.

What is an inhibitor?

A substance that prevents certain chemical reactions.

What happens during synthesis in a chemical reaction?

When two or more substances combine to form another substance. Signup and view all the answers

What is decomposition?

The breakdown of a substance into two or more simpler substances. Signup and view all the answers

What are reactants?

Substances that react. Signup and view all the answers

What is a catalyst?

A substance that speeds up the rate of a chemical reaction. Signup and view all the answers

What does endothermic mean?

A reaction that requires energy in the form of heat. Signup and view all the answers

What is single-displacement?

When one element replaces another in a compound. Signup and view all the answers

What is the role of coefficients in a chemical equation?

Numbers in front of the symbols and formulas in an equation. Signup and view all the answers

In a balanced equation, the number of atoms of each element is equal on both sides.

True Signup and view all the answers

What are products in a chemical reaction?

The substances that are produced. Signup and view all the answers

What is a precipitate?

An insoluble solid that forms when two ionic compounds in solution. Signup and view all the answers

Study Notes

Chemical Reactions Overview

A chemical reaction involves the transformation of substances into new forms, indicating changes at the molecular level.
Reactants are the initial substances that undergo transformation in a chemical reaction.
Products are the new substances formed as a result of the chemical reaction.

Types of Reactions

Double-displacement reactions occur when two ionic compounds react in solution, resulting in the formation of a precipitate, water, or gas.
Single-displacement reactions involve one element taking the place of another within a compound, leading to a new compound and a differing element.
Synthesis reactions involve the combination of two or more reactants to form a single product.
Decomposition reactions break down a compound into two or more simpler substances.

Reaction Characteristics

A precipitate is an insoluble solid produced from a double-displacement reaction when ionic solutions are mixed.
Inhibitors are substances that block or slow down specific chemical reactions, affecting the reaction rate.
Catalysts are substances that accelerate the rate of chemical reactions without being consumed in the process.

Energy Considerations

Endothermic reactions absorb energy, primarily in the form of heat, resulting in a temperature drop in the surroundings.

Chemical Equation Essentials

Coefficients are numbers placed before chemical symbols in equations indicating the amount of each reactant or product involved.
A balanced equation reflects an equal number of atoms for each element on both sides of the equation, signifying mass conservation.

Key Definitions

Balanced reactions are crucial for accurate representation in chemistry, ensuring that mass is conserved during the reaction process.

Description

Test your knowledge on chemical reactions with this set of flashcards. Each card defines key terms essential for understanding the principles of chemical changes, such as double-displacement and inhibitors. Perfect for students preparing for assessments in chemistry.