Acids and Alkalis resources
Chemistry, grade 9. Notes, worksheets, videos, interactive tools and revision materials for this chapter.
Notes
Study notes
The chapter's lessons are the notes — read them in order, then use the resources below.
01Acids in Everyday LifeMeet acids in citrus fruits, vinegar and your stomach.Read lesson →02The pH ScaleUse the 1–14 scale to measure how acidic or alkaline a solution is.Read lesson →03Testing with IndicatorsUse litmus and universal indicator to test for acids and alkalis.Read lesson →04Acids Meet AlkalisSee how acids and alkalis cancel each other out.Read lesson →
Worksheets
Practice worksheet
Attempt every question before revealing the answer — that struggle is where learning happens.
Practice questions live inside each lesson — work through them there, then return for revision.
Videos
Watch and learn
Hand-picked searches to find a clear video explanation of each lesson.
Revision
Revision checklist
Can you explain each of these out loud, without looking? If not, re-read that lesson.
- Acids in Everyday Life: Meet acids in citrus fruits, vinegar and your stomach.
- The pH Scale: Use the 1–14 scale to measure how acidic or alkaline a solution is.
- Testing with Indicators: Use litmus and universal indicator to test for acids and alkalis.
- Acids Meet Alkalis: See how acids and alkalis cancel each other out.
- Read each lesson's summary and re-do its practice questions from memory.