chemistry

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Across
  1. 1. a substance that increases the rate of a reaction but is not used up in the reaction
  2. 4. a mixture of a solute dissolved in a solvent such as water
  3. 6. a small number of active molecules (such as acid) in a solution
  4. 7. this refers to an acid solution with a high concentration of hydrogen ions
  5. 9. a reaction that involves the breakdown of a compound into simpler substances
  6. 11. a reaction that involves oxygen and releases light and heat energy
Down
  1. 2. an ion that does not take part in a chemical reaction
  2. 3. a theory stating that the particles involved in a chemical reaction must collide in order to react
  3. 5. a reaction in which and acid and a base combine to produce a metal salt and water
  4. 8. an object or substance that can be broken down by bacteria, fungi and other living organisms
  5. 10. an insoluble compound formed in a precipitation reaction