| A | B |
|---|
| Chemical Reaction | A change in which one or more substances are converted into new substances |
| Reactants | Substances to the left of the arrow |
| Products | Substances to the right of the arrow |
| Chemical Formula | Notation for a compound using chemical symbols and numbers |
| Subscript | Number below the line (quantity of the atom before it) |
| Coefficient | Number in front of a chemical, represents how many units of that chemical that react |
| (s) | solid |
| (l) | liquid |
| (g) | gas |
| (aq) | aqueous |
| Law of Conservation of Mass | Mass is neither created nor destroyed in an ordinary chemical reaction |
| Synthesis Reaction | A + B → AB |
| Decomposition Reaction | AB → A + B |
| Single Displacement Reaction | A + BX → AX + B |
| Double Displacement Reaction | AX + BY → AY + BX |
| Precipitate | A solid compound that comes out of solution during a double replacement reaction |
| Combustion Reaction | A + O2 → AO2 |
| Exothermic | Energy released as heat (gets hot) |
| Endothermic | Reaction absorbs heat (gets cold) |
| Catalyst | A substance that speeds up a reaction without becoming changed itself |
| Inhibitor | Substances that slow down reaction rates |
| Equilibrium | The state in which the forward and reverse reactions take place at equal rates |
| Chemical equation | A way to describe a chemical reaction using chemical formulas and other symbols |
| Collision model | States that atoms, ions, and molecules must collide in order to react |
| Reversible reaction | A reaction that can move forwards and in reverse (double arrow) |
| Le Châtelier’s principle | States that as a stress is applied to a system at equilibrium, the equilibrium shifts in the direction that opposes the stress |
