Topic 1 - Chemical Reactions

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Author:
Anonymous
ID:
73087
Filename:
Topic 1 - Chemical Reactions
Updated:
2011-03-15 14:49:11
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Chemistry Chemical Reactions
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Description:
Standard Grade Chemistry - Topic 1 - Chemical Reactions
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  1. In all new chemical reactions one or more _____ substances are formed?
    new
  2. How do you identify a chemical reaction?
    • An energy change
    • A change of colour
    • A gas produced
    • A solid (precipitate) formed when two solutions are mixed
  3. What is the simplest chemical substance?
    An element
  4. Elements ______ be broken down into anything simpler?
    cannot
  5. Elements contain only one type of ____ ?
    atom
  6. What is formed when elements join together?
    compounds
  7. What can elements be represented by?
    A chemical symbol
  8. What are formed when two substances come together without reacting?
    Mixtures
  9. Are new substances formed in mixtures?
    No
  10. A solution is formed when a ______ dissolves in a ______?
    • solute
    • solvent
  11. What is the insoluble solid formed when two solutions are mixed called?
    A precipitate
  12. What is a precipitate reaction?
    A reaction in which an insoluble solid is formed when two solutions are mixed
  13. How can an insoluble solid be separated from a solution?
    By filtering
  14. A reaction in which energy is given out is said to be ________?
    exothermic
  15. A reaction in which energy is taken in is said to be
    _______?
    endothermic
  16. Compounds containing only two elements have names ending in....?
    -IDE
  17. Compounds containing three or more elements, one of which is oxygen, have a name ending in....?
    • -ATE
    • -ITE

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