Chem 2 Key Terms

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Across
  1. 3. _______ distillation - a process for separating liquids by their boiling points. (10)
  2. 4. A chemical that increases the rate of a reaction by reducing the activation energy. (8)
  3. 7. Smoke particles released by burning hydrocarbon fuels (12)
  4. 10. Water that can be safely drunk. (7)
  5. 11. A factor that affects the rate of a reaction. (11)
  6. 12. A chemical that fits the general formula CnH2n+2. (6)
  7. 13. The source of the Earth's early atmosphere. (9)
  8. 15. Much of the Earth's CO2 has dissolved into the ______ (6)
  9. 17. A factor that affects the rate of a reaction. (13)
  10. 18. A process for purifying copper using bacteria. (11)
  11. 19. A substance made of one type of compound or element (4)
  12. 20. A process for purifying copper using planats. (11)
Down
  1. 1. Particles may react when they ________. (7)
  2. 2. A mixture designed for a purpose (11)
  3. 5. A factor that affects the rate of a reaction. (11)
  4. 6. A system where atoms and energy cannot enter or leave. (6)
  5. 7. The process that decreased CO2 in the air and replaced it with O2 (14)
  6. 8. A process for splitting large hydrocarbons into smaller ones. (8)
  7. 9. A chemical that fits the general formula CnH2n. (6)
  8. 14. _________ energy - the minimum energy needed for particles to react. (10)
  9. 16. A chemical made from a chain of repeating units (7)