chem 1

• Stoichiometry


  Greek “stoicheion” - element

  A branch of chemistry that deals with the application of the laws of definite proportions and of the conversion of mass and energy to chemical activity
• Law of Definite Proportions


  A given chemical compound always contains the same elements in the exact same proportions by mass
• Conversion Schemes in Stoichiometry

  1. Moles to grams

  2. Grams to moles

  3. Moles to volume

  4. Volume to moles
• Balancing an equation is important because it satisfies the law of conservation of matter
• Chemical reaction


  A process in which a substance (or substances) is changed into one or more new substances
• Chemical equation


  Uses chemical symbols to show what happens during a chemical reaction
• The chemical equations must satisfy the law of conservation of matter to be balanced
• Matter can neither be created nor destroyed - only converted from one form to another
• Stoichiometry is a branch of chemistry that deals with the application of the laws of definite proportions and of the conversion of mass and energy to chemical activity
• The law of definite proportions states that a given chemical compound always contains the same elements in the exact same proportions by mass