7: Chemical Reactions
- Page ID
- 323302
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- 7.1: Prelude to Chemical Reactions
- The space shuttle—and any other rocket-based system—uses chemical reactions to propel itself into space and maneuver itself when it goes into orbit. The rockets that lift the orbiter are of two different types. Although the solid rocket boosters each have a significantly lower mass than the liquid oxygen and liquid hydrogen tanks, they provide over 80% of the lift needed to put the shuttle into orbit—all because of chemical reactions.
- 7.2: Evidence of a Chemical Reaction
- In a chemical change, new substances are formed. In order for this to occur, the chemical bonds of the substances break, and the atoms that compose them separate and rearrange themselves into new substances with new chemical bonds. When this process occurs, we call it a chemical reaction. A chemical reaction is the process in which one or more substances are changed into one or more new substances.
- 7.3: Chemical Equations
- A chemical reaction is the process in which one or more substances are changed into one or more new substances. Chemical reactions are represented by chemical equations. Chemical equations have reactants on the left, an arrow that is read as "yields", and the products on the right.
- 7.4: How to Write Balanced Chemical Equations
- In chemical reactions, atoms are never created or destroyed. The same atoms that were present in the reactants are present in the products—they are merely reorganized into different arrangements. In a complete chemical equation, the two sides of the equation must be present on the reactant and the product sides of the equation.
- 7.5: Acid–Base and Gas Evolution Reactions
- A gas evolution reaction is a chemical process that produces a gas, such as oxygen or carbon dioxide.
- 7.6: Oxidation–Reduction Reactions
- An oxidation-reduction reaction is a reaction that involves the full or partial transfer of electrons from one reactant to another. Oxidation is the full or partial loss of electrons or the gain of oxygen. Reduction is the full or partial gain of electrons or the loss of oxygen. A redox reaction is another term for an oxidation-reduction reaction.
- 7.7: Classifying Chemical Reactions
- Chemical reactions are classified into types to help scientists analyze them, and also to help scientists predict what the products of the reaction will be. The five major types of chemical reactions are synthesis, decomposition, single replacement, double replacement, and combustion.