Chemical Reactions and Equations

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Across
  1. 2. CaO + H20 is a ______ reaction (exothermic/endothermic)
  2. 6. gas evolved when an acid reacts with a metal
  3. 7. common name of calcium hydroxide
  4. 10. ______ reactions
  5. 11. a substance that undergoes a chemical change in a reaction
  6. 12. substance that speeds up a chemical reaction
Down
  1. 1. brown gas produced during the decomposition of lead nitrate
  2. 3. a substance which turns from green to white when heated
  3. 4. a magnesium ribbon burns in _____ colour
  4. 5. an insoluble solid formed during a double displacement reaction
  5. 8. during a double displacement reaction, _____ are exchanged
  6. 9. most reactive metal