AS and A Level Chemistry B
21 October 2019
Following feedback we have received about some online resources and textbooks containing incorrect equations for calculating the depletion of ozone by chlorine radicals (OZ(q)), we’ve updated our Chemistry B specifications for AS (H033) and A Level (H433) to provide additional guidance.
This update reflects the guidance already provided in our Chemistry A specifications for AS (H032) and A Level (H432) and we have included examples of the equations expected for this process.
We have published the latest version of the specifications on the Chemistry B AS (H033) and A Level (H433) qualification pages.
If you have any questions, please contact the science subject team on 01223 553998 or at science@ocr.org.uk.
Qualifications