Have some sympathy for Svante Arrhenius, the Swedish chemist who won the Nobel Prize for Chemistry in 1903. Sub-topic 8.1 is titled "Theories of acids and bases" and yet the only theory covered in the subsequent "Understandings" is the BrØnsted-Lowry theory. Arrhenius"s ionic theory is implied throughout all of the sub-topics 8.1 - 8.5 and in the AHL sub-topics in Topic 18 but it is not specifically mentioned. The Lewis...