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Across 2. Term used to describe a solution which has a lot os solute dissolved in it. 5. Bicarbonate of soda can be used to neutralise a sting form this insect. 6. This neutralises the acids in your mouth 8. Solutions that can harm the body 9. Work out the average result from these titration results: 21.50, 20.10, 19.90, 20.00cm 11. This is blue and stays blue in an alkaline solution. 12. This indicator is made up of a mixture of indicators and shows pH over a wide range. 13. A special accurate piece of equipment used to measure exactly how much acid is needed to neutralise an alkali. 15. A chemical that substances can dissolve in (usually water`) 16. This is used to identify an unknown solution as acid or alkaline. 21. Bicarbonate of soda is an example of an _______________ 23. a non toxic substance that can be eaten to neutralise excess acid in the stomach 25. Not corrosive but can cause temporary inflammation to eyes, skin and lungs 26. When this dissolves in water it is called an alkali. 27. A solution with a pH of 7 is described as being _______________

Down 1. A chemical change between an acid and alkali forming a salt and water (14) 2. A solution with no colour is described like this. 3. During neutralisation the temperature will ______ 4. During neutralisation the pH changes and moves towards this value. 7. The boiling point of water is 100 degrees celsius. This is used as a _________________ test for pure water. 10. This type of alkali has a pH between 7 and 10 14. Acidic soil can be neutralised using this substance (9) 17. A chemical that can dissolve in water 18. A bee sting is _______________. 19. This is what we do to sets of results to find the most accurate result after removing anomalies 20. Acid + Alkali makes _________ + water 22. A solution with a pH less than 7 24. The sting from this insect can be neutralised with vinegar (acid)