Chapter 11

  1. evidence of chemical reactions
    atoms of 1 or more substances are rearranged to form different substances
  2. evidence of chemical change
    • temp change, color change, gas bubbles, precipitate-solid resulting from 2 clear liquids
    • -law of conservation-matter is neither created nor destroyed (matter is conserved during a reaction)
  3. word equations
    written out instructions of an equation
  4. skeleton equations
    uses chemical formulas to identify reactants and products
  5. chemical equations
    must show how law of conservation of matter is obeyed
  6. # atoms of reactants=?
    # atoms of products
  7. coefficient
    • number written in front of a reactant or product.
    • -describes the lowest whole ration of amounts of all reactants and products
  8. synthesis reaction
    also called composition reactions; 2 elements or simple compounds combine to form new compounds; generally compounds produced are larger or more complex than the reactants
  9. combustion reactions
    normally involve a substance reacting rapidly with oxygen gas, releasing heat and light
  10. decomposition
    a single compound breaks down into 2 or more elements or less complex compounds; most are endothermic.
  11. metallic chlorates
    break down to metal chloride and oxygen gas
  12. carbonates
    break down to metal oxide and carbon dioxide
  13. metallic hydroxides
    break down to metal oxide and water
  14. certain acids
    weak acids break down to non-metal oxide and water
  15. certain metal oxides
    metal oxide breaks down to metal and oxygen
  16. electrolysis of molten salts
    breaks down to the basic elements
Card Set
Chapter 11
Chemical Reactions