Questions and Answers
What is a chemical formula?
A group of chemical symbols and numbers that represent the elements and the number of atoms of each element that make up a compound.
What is a chemical equation?
A representation of a chemical reaction that uses symbols to show the relationship between the reactants and the products.
What are reactants?
Elements or compounds that enter into a chemical reaction.
What are products?
Signup and view all the answers
What are coefficients?
Signup and view all the answers
What are subscripts?
Signup and view all the answers
What is a molecular formula?
Signup and view all the answers
What is a balanced equation?
Signup and view all the answers
What is a precipitate?
Signup and view all the answers
What is a molecule?
Signup and view all the answers
What is a compound?
Signup and view all the answers
What is the law of conservation of mass?
Signup and view all the answers
What is an element?
Signup and view all the answers
What type of reaction is represented by 2Mg + 1O2 → MgO?
Signup and view all the answers
What type of reaction is represented by 2H2O2 → 2H2O + 1O2?
Signup and view all the answers
What type of reaction is represented by 1Mg + 2HCl → 1MgCl2 + 1H2?
Signup and view all the answers
What type of reaction is represented by NaOH + HCl → NaCl + HOH?
Signup and view all the answers
What does balancing chemical equations involve?
Signup and view all the answers
Study Notes
Chemical Terminology
- Chemical Formula: Represents elements and the number of atoms present in a compound.
- Chemical Equation: Symbolic representation showing the relationship between reactants and products.
- Reactants: Elements or compounds entering a reaction.
- Products: Elements or compounds resulting from a chemical reaction.
Chemical Components
- Coefficients: Numbers placed before chemical formulas to indicate quantity.
- Subscripts: Numbers below chemical symbols indicating the number of atoms in a compound.
- Molecular Formula: Indicates types and amounts of atoms in a molecule, without specifying arrangement.
Reaction Types
- Balanced Equation: An equation where the number of atoms for each element is the same on both sides.
- Precipitate: A solid formed from a solution in a chemical reaction.
Laws of Chemistry
- Law of Conservation of Mass: Total mass remains constant in physical and chemical changes, indicating matter is neither created nor destroyed.
- Element: A pure substance consisting of one type of atom.
Types of Reactions
- Synthesis: Combines simple reactants into more complex products (A+B → AB).
- Decomposition: A single compound breaks down into simpler products (AB → A + B).
- Single Replacement: An element replaces another in a compound (AB + C → A + BC).
- Double Replacement: Two compounds exchange partners (AB + CD → AC + BD).
- Combustion: Rapid reaction with oxygen, typically producing heat and light.
Reaction Classification Examples
- Synthesis Example: 2Mg + 1O₂ → MgO.
- Decomposition Example: 2H₂O₂ → 2H₂O + 1O₂.
- Single Replacement Example: 1Mg + 2HCl → 1MgCl₂ + 1H₂.
- Double Replacement Example: NaOH + HCl → NaCl + H₂O.
Balancing Chemical Equations
- Balancing involves adjusting coefficients to maintain equal atoms of each element on both sides.
- Example of balancing: The equation CaO + H₂O → Ca(OH)₂ is balanced.
Concept Applications
- Using relatable scenarios for reaction types:
- Synthesis: A new couple forms at a prom.
- Decomposition: A couple breaks up at a prom.
- Single Replacement: A couple switches partners with a single student.
- Double Replacement: Two couples switch partners, forming new couples.
Studying That Suits You
Use AI to generate personalized quizzes and flashcards to suit your learning preferences.
Description
Test your knowledge on chemical reactions by balancing equations and classifying different types of reactions. This quiz will help reinforce key concepts such as chemical formulas and equations, as well as terminology related to reactants and products.