I hope my summary notes for the OCR exam board A-Level exams will be helpful to you鈥攄ear teachers鈥攊n your teaching, and to students in achieving the highest possible grades. Here you can find all OCR-specific A level notes for Chemistry and Biology.

Last updated

11 April 2025

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  • 20.1 Bronsted-Lowry acids and bases
  • 20.2 pH scale
  • 20.3 dissociation constant Ka
  • 20.4 pH of weak acids
  • 20.5 pH
  • EXTRA: Ka expressions

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