Types of Chemical Reactions

Questions and Answers

What are reactants?

Solid formed from mixing two liquids

Substances present before the change takes place (correct)

Substances that slow down a reaction

Substances that are formed after a chemical reaction

What are products?

Reactants in the chemical reaction

Substances that are formed after a chemical reaction (correct)

The energy released during a reaction

The catalyst used in the reaction

What is a precipitate?

A solid formed from mixing two liquids.

What is a catalyst?

A substance that speeds up or slows down a reaction without being consumed. Signup and view all the answers

What is a neutralization reaction?

An acid reacts with a base, forming a salt and water. Signup and view all the answers

Define oxidation-reduction (redox) reaction.

A classification of chemical reactions based on the transfer of electrons. Signup and view all the answers

What is oxidation?

Loss of electrons. Signup and view all the answers

What is reduction?

Addition of electrons. Signup and view all the answers

What is a combination reaction?

Two or more atoms or small molecules combine to form a larger molecule. Signup and view all the answers

What happens in a decomposition reaction?

A larger molecule breaks down into atoms or small molecules. Signup and view all the answers

What is a single replacement reaction?

One atom replaces another atom in a molecule. Signup and view all the answers

What characterizes a double replacement reaction?

Two molecules trade parts with each other. Signup and view all the answers

What does the equation 4Fe(s) + 3O₂(g) ---> 2Fe₂O₃(s) represent?

Combination reaction Signup and view all the answers

What does the equation 2HgO(s) ---> 2Hg(s) + O₂(g) represent?

Decomposition reaction Signup and view all the answers

Identify the type of reaction: Zn(s) + 2HCl(aq) ---> ZnCl₂(aq) + H₂(g)

Single replacement reaction Signup and view all the answers

Determine the type of reaction: AgNO₃(aq) + NaCl(aq) ---> AgCl(s) + NaNO₃(aq)

Double replacement reaction Signup and view all the answers

What type of reaction does the equation HCl(aq) + NaOH(aq) ---> NaCl(aq) + HOH(l) represent?

Neutralization reaction Signup and view all the answers

Identify the type of reaction represented by the equation Zn⁰ + 2H¹⁺ ---> Zn² + 2Cl¹⁻ + H₂⁰.

Oxidation-reduction reaction Signup and view all the answers

Study Notes

Types of Chemical Reactions

Reactants: Substances that exist before a chemical change occurs.
Products: Substances formed as a result of a chemical reaction.

Key Reaction Types

Precipitate: Results from mixing two liquids, leading to the formation of a solid.
Catalyst: A substance that alters the speed of a reaction (usually enzymes) without being consumed itself.

Neutralization Reactions

Defined as a type of double replacement where an acid reacts with a base, producing salt and water.
General formula: Acid + Base → Salt + Water (e.g., HCl + NaOH → NaCl + H2O).

Oxidation-Reduction (Redox) Reactions

Classify reactions based on the transfer of electrons between atoms or ions.
Oxidation: Defined as the loss of electrons.
Reduction: Defined as the gain of electrons.

Other Reaction Types

Combination Reaction: Occurs when two or more small molecules combine to form a larger molecule (e.g., 4Fe(s) + 3O₂(g) → 2Fe₂O₃(s)).
Decomposition Reaction: A larger molecule breaks down into smaller molecules or atoms (e.g., 2HgO(s) → 2Hg(s) + O₂(g)).
Single Replacement Reaction: One atom in a molecule is replaced by another atom (e.g., Zn(s) + 2HCl(aq) → ZnCl₂(aq) + H₂(g)).
Double Replacement Reaction: Involves two molecules that exchange parts (e.g., AgNO₃(aq) + NaCl(aq) → AgCl(s) + NaNO₃(aq)).

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Description

Test your knowledge of various types of chemical reactions, including precipitate, neutralization, and redox reactions. This quiz covers key concepts, definitions, and examples to help you understand how different substances interact during chemical processes.