Chemical Reactions

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Across
  1. 4. a natural indicator (starts with b)
  2. 6. the taste of a base
  3. 9. a chemical reaction that releases heat
  4. 11. a base dissolved in water
  5. 12. a very reactive substance- readily gives/accepts hydrogen ions
  6. 14. a scale that measures how acidic or alkali a substance is
  7. 16. a high ratio of a substance to its solvent (eg. 10:1)
  8. 18. an acid contained in apples
  9. 20. the taste of an acid
  10. 21. a substance containing hydrogen, carbon and oxygen
  11. 23. when atoms are joined they form .......
  12. 24. a substance that changes colour in the prescience of an acid or a base
  13. 25. a chemical reaction that absorbs heat
  14. 26. fuels that come from non renewable ressources (such as coal)
  15. 28. a reaction when one atom or compound steal electrons from another
  16. 31. a substance that has a pH higher than 7
  17. 32. an indicator that turns red in acid and blue in base
Down
  1. 1. fuels that come from living organisms
  2. 2. to make something neutral (occurs when a base and acid of equal strength mix)
  3. 3. a low ratio of a substance to its solvent (eg. 1:10)
  4. 5. a substance that contains hrdrogen and carbon
  5. 7. not very reactive substance
  6. 8. a substance that undergoes a chemical reactions and produces a large amount of energy
  7. 10. an acid that has the chemical formula HCl
  8. 13. a natural indicator
  9. 14. an indicator with chemical formula C20H14O4
  10. 15. a substance that has a pH lower than 7
  11. 17. when a solute it dissolved in a solvent
  12. 19. the degradation of materials due to their environment
  13. 22. fuel + oxygen = carbon dioxide and water
  14. 27. the texture of most bases
  15. 29. when a substance is dissolved water
  16. 30. compound that contains metal cation and nonmetal anion