This is the mark scheme of the acids and redox booklet that I have uploaded before. It, unfortunately, didn't attach to the same document so you will find it here.

This is the Mark scheme of the Acids and Redox booklet that has been uploaded as well.

This booklet has summarized everything you need to know about Acids and Redox OCR A levels. Everything in this booklet is covered in the specification of OCR. You will have definitions of key terms, explanations of alkalis and bases, titrations, acids, redox, and many more. Each page will have exercises that will help you understand the topic more. This booklet also comes with a mark scheme to check your answers. It is a very efficient way to revise for your A-levels.