Across
- 2. A substance with a pH less than 7 that can react with metals and bases.
- 3. The gas commonly produced during an acid-metal reaction.
- 5. A type of element that reacts with acids to produce hydrogen gas.
- 9. A substance with a pH greater than 7 that can neutralise an acid.
- 11. A gas required for burning to occur.
- 13. A chemical reaction involving fuel and oxygen that releases energy.
- 14. One of the products formed in both acid-metal and acid-base reactions.
- 15. The reaction that occurs when an acid reacts with a base.
Down
- 1. The model showing the three requirements for combustion.
- 4. A substance present at the beginning of a chemical reaction.
- 6. A common metal used in acid-metal reaction experiments.
- 7. A gas produced during complete combustion.
- 8. A substance formed during a chemical reaction.
- 10. A substance that burns during a combustion reaction.
- 12. A substance that changes colour to show pH.