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| 1. | Indicator used in the lab to show a full range of colours from acid (red) to alkali (blue) 2 words |
| 4. | Papers or liquids used to show whether a substance is acid or alkali (10 letters) |
| 5. | What acids and alkalis do to one another (10 letters) hint: think of cancelling each other out |
| 7. | Purple indicator which changes red for acid, blue for alkali (6 letters) |
| 8. | Name of the scale which indicates acids (1) to alkali (14) - 2 words: 2 letters, 5 letters |
| 10. | A pH of 7 is neither acidic nor alkali, it is ....(7 letters) |
| 12. | A strong acid will eat away at steel. We say it is .... (9 letters) |
| 13. | Acids and alkalis neutralise each other making a salt plus .... (5 letters) |
| 14. | Alkalis like sodium hydroxide feel like this .... (5 letters) hint: what do you wash your hands with? |