Chemical Reactions and Stoichiometry Flashcards

Grade 9 · Science · Flashcards

Review chemical reaction types, balancing equations, and stoichiometry with these 12 flashcards.

Flashcards

Chemical Reaction: A process where reactants are transformed into products through breaking and forming chemical bonds.
Reactant: Starting substance in a reaction; appears on the left side of a chemical equation.
Product: Substance produced in a reaction; appears on the right side of a chemical equation.
Law of Conservation of Mass: Total mass of reactants = total mass of products; atoms are rearranged, not created or destroyed.
Coefficient: Number in front of a chemical formula in an equation indicating the number of moles of that substance.
Synthesis Reaction: Two or more reactants combine to form one product: A + B → AB.
Decomposition Reaction: One compound breaks into two or more simpler products: AB → A + B.
Single Replacement: One element replaces another in a compound: A + BC → AC + B.
Double Replacement: Two ionic compounds exchange ions: AB + CD → AD + CB; often forms a precipitate.
Combustion Reaction: Fuel reacts with O₂ to produce CO₂ and H₂O; releases energy as heat and light.
Mole: 6.022 × 10²³ particles of a substance; the bridge between atomic mass and measurable grams.
Stoichiometry: Using balanced equations and molar ratios to calculate quantities of reactants and products.