Entry Level Crossword

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Across
  1. 2. Element Cu
  2. 4. Colour of a strong acid in universal indicator
  3. 6. pH of a strong acid
  4. 9. Acid + Base -> ____ + Water
  5. 10. Element Pb
  6. 11. Element H
  7. 12. Element Ar
  8. 13. Element He
  9. 16. Acid + ______ -> Salt + Water
  10. 18. First layer of the earth
  11. 19. pH of water
  12. 20. We can speed up a reaction by increasing this
  13. 22. The process of removing salt from water
  14. 23. Acid + ______ - > Salt + Hydrogen
  15. 24. Colour of water in universal indicator
Down
  1. 1. Element Fe
  2. 3. Colour of a strong alkali in universal indicator
  3. 5. pH of a strong alkali
  4. 7. Acid + _________ -> Salt + Water + Carbon Dioxide
  5. 8. Compound CO2
  6. 14. Second layer of the Earth
  7. 15. Compound H20
  8. 17. Reaction which gives out heat
  9. 21. Reaction which takes in heat