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Across 3. This fizzes when mixed with an acid (9) 7. pH7 (7) 8. This is present in all acids (8) 10. Paper for testing pH (6) 11. A mixture of dyes that change colour in acids and alkalis (9) 14. Warning label with a black cross (8) 16. Chemicals that combine to make a product (9) 19. ............ Chloride - the chemical name for table salt (6)

Down 1. Acids and alkalis will only react when they are dissolved in this (5) 2. Cancelling out an acid (14) 3. Strong acids and alkalis will have this warning label (9) 4. Anything that will neutralise an acid (5) 5. A safer gas for airships (6) 6. Hydrogen gas is given off when these mix with acids (6) 9. Turns cloudy when mixed with carbon dioxide (9) 12. Saliva, wasp stings, and most cleaners are this (8) 13. A cure for too much acid in your stomach (7) 15. Sugar solutions, fizzy drinks, and bee stings are this (6) 17. This is always made when an acid is neutralised (4) 18. An acid tastes like this (4)