Chemistry revision

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Across
  1. 2. A piece of equipment used to separate 3 or more liquids
  2. 4. simplest ratio of atoms in a compound
  3. 7. Pink to colourless
  4. 11. Unwanted substance after filtration
  5. 14. iron oxide is removed when reacted with this
  6. 15. insoluble solid forms when two soluble solutions are mixed
  7. 16. Type of force between ions
  8. 19. colour of copper sulphate crystals
  9. 21. Rate of forward and backward reaction is the same
  10. 23. ions that do not change in a reaction
  11. 28. HNO3
  12. 29. pH range 8 - 14 and dissolves in water
  13. 30. Change of state
Down
  1. 1. Patterns in the periodic table
  2. 3. Positively charged electrode
  3. 5. Type of force between molecules
  4. 6. Unique information in chromatography
  5. 8. Solid to gas
  6. 9. This reactant has been used up
  7. 10. Single layer of graphite
  8. 12. Lightest subatomic particle
  9. 13. Clean drinking water
  10. 17. Number of protons and electrons in an atom
  11. 18. heat is released from a reaction
  12. 20. Iron replaces copper
  13. 22. 6.02 x 10^23
  14. 24. Type of diagram to show covalent bonding
  15. 25. Neutron numbers vary
  16. 26. Substance added to aluminium oxide during electrolysis
  17. 27. Type of structure for ionic substances