1 AS resources Search within results Go How ratings and recommendations work Apply Filter resourcesClear all filtersLevelClear filter AS Subject Chemistry Exam board OCR TopicClear filter Equations Formulae Ions Polyatomic Ions Resources Crossword Flashcards Multi-tool Quizsearch Formulae and Equations - Module 2.1.2 - OCR - AS Chemistry AS, Chemistry 12 flashcards Search again