<p>The document contains a summary of buffer solutions (definition, what the solution does and how it does it). There are example buffer calculation questions with clear guidance on how to solve them. There are 8 practice questions for you try thereafter. Answers can be found towards the end of the document for self assessment.</p>

<p>OCR A, A Level Organic chemistry, revision PowerPoint on the different types of reactions and reaction mechanisms.</p>

<p>Worksheet on Carboxylic acids and Esters for GCSE/iGCSE.</p>

<p>3 questions (+ mark scheme) on carbonyl compounds drawing on material covered in the topic and making links to other organic topics.</p>