Chemical Reactions Crossword

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Across
  1. 2. A substance that can neutralise an acid (4)
  2. 3. A reaction between an acid and an alkali (13)
  3. 4. A reaction where a more reactive metal takes the place of a less reactive one (11)
  4. 6. A type of chemical substance with a pH below 7 (5)
  5. 8. A rapid reaction that releases heat and light (10)
  6. 9. A gas produced when acids react with some metals (8)
  7. 10. A type of base that dissolves in water (7)
  8. 11. A reaction that releases heat to the surroundings (10)
  9. 12. A type of reaction that absorbs heat from the surroundings (11)
Down
  1. 1. A salt of a metal and carbonic acid (5, 9)
  2. 5. A compound containing a metal and oxygen (5, 6)
  3. 7. A gas produced when metal carbonates react with acids (6, 8)