Unit 2 · 8 lessons
Chemical Reactions
How to name compounds and write their formulas, recognize and balance chemical reactions, classify them as synthesis, decomposition, displacement or combustion, measure acids and bases with pH, and use neutralization to solve real environmental problems.
- 72 practice questions
- 64 flashcards
- 2 interactive lessons
Lessons
- 1Naming and Writing Formulas for Ionic CompoundsHow metals and non-metals form ions, how to predict an ion's charge from the periodic table, how to write a formula whose charges add to zero, and how to name ionic compounds, including metals with more than one possible charge.9 questions
- 2Polyatomic Ions, Molecular Compounds and AcidsWriting formulas and names for compounds that contain polyatomic ions, naming molecular compounds of two non-metals with prefixes, and naming common acids such as hydrochloric and sulfuric acid.9 questions
- 3Evidence of Chemical Change and Conservation of MassHow to tell a chemical change from a physical one using five kinds of evidence and gas tests, the vocabulary of reactants and products, and why mass is always conserved even when a balance seems to say otherwise.9 questions
- 4Word Equations and Balanced Chemical EquationsTurning a word equation into a skeleton equation with correct formulas, then balancing it with coefficients and an atom inventory so that every atom is accounted for, as the law of conservation of mass requires.Interactive9 questions
- 5Synthesis and Decomposition ReactionsRecognizing, predicting and balancing synthesis reactions (A + B → AB), where substances combine into one product, and decomposition reactions (AB → A + B), where one compound breaks apart.Interactive9 questions
- 6Single Displacement, Double Displacement and CombustionPredicting single displacement reactions with the activity series, predicting double displacement reactions that form a precipitate, and writing balanced equations for the complete and incomplete combustion of hydrocarbons.9 questions
- 7Acids, Bases, pH and IndicatorsThe properties of acids and bases, what makes a substance acidic or basic, how the pH scale works (each step is a factor of 10), and how to classify household substances with litmus, other indicators and pH paper.9 questions
- 8Neutralization and Reactions in the EnvironmentHow acids and bases neutralize each other to form a salt and water, and how chemistry is used to clean up acid spills, restore acidified lakes, scrub smokestack gases and renew the Great Lakes, along with the hazards of cyanide in gold mining, corroding bridges and pool chemicals.9 questions