| A | B |
|---|
| means sour tasting | acid |
| the opposite of an acid | alkali |
| not acid nor alkali | neutral |
| in acid, litmus paper turns | red |
| used to test a range of pHs | Universal indicator |
| strong acid | pH 1-4 |
| weak acid | pH 5-6 |
| neutral | pH 7 |
| weak alkali | pH 8-10 |
| strong alkali | pH 11-14 |
| general name for a substance which will tell us if something is acid or alkali | indicator |
| used to measure the strength of an acid / alkali | pH scale |
| concentrated acids and alkalis are | corrosive |
| A corrosive substance | can destroys living tissue and metal |
| dilute acids and alkalis | are not corrosive |
| acids and alkalis react | to form a neutral solution |
| too much acid in the stomach causes | indigestion |
| indigestion cures | neutralise stomach acid |
