Acids and the Environment

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Across
  1. 3. Harmful gases such as sulfur dioxide, nitrogen dioxide and carbon dioxide do this when they mix with water in the atmosphere
  2. 5. We put bicarbonate of soda on this type of sting to neutralise it
  3. 6. This is a type of reaction where we add acid to alkali and reduce the pH to a neutral 7
  4. 7. Along with water, this is produced during a neutralisation reaction
  5. 9. Nitrogen Dioxide dissolves in rainwater to produce this
  6. 12. We use this experimental technique to extract a solid that is dissolved in a liquid.
  7. 13. We made a plant indicator from this vegetable
  8. 14. This is a commonly used indicator which is purple in alkali and red in acid
  9. 15. This is produced when we mix acid with a carbonate
  10. 18. This is an example of a common household acid
  11. 19. This is an environmental problem caused when gases dissolve in rainwater
Down
  1. 1. Fizzy drinks have a pH that tells us they are this type of substance
  2. 2. This is an indicator that is a bright deep pink when in alkali and a milky colour in acid
  3. 4. This salt is made from hydrochloric acid and sodium hydroxide
  4. 8. We use this method to extract a solid product from a liquid
  5. 10. This is an example of an alkali
  6. 11. This is what happens to the pH of an alkali when we add acid to it
  7. 16. This is added to solutions to help us decide if it is acid or alkali
  8. 17. This is the name of a liquid with a pH of 7.1-14
  9. 20. A liquid with a pH of 7 is said to be this