Chemistry study notes
Acid-Base Chemistry
Use ions and reaction patterns to explain acids, bases and salts.
O-Level 5086 / 5088 (2026) / SEC G3 K326 / K328 (2027)
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5. Acid-Base Chemistry (5086 / 5088 / K326 / K328). Use the outcome map to find the explanation for a particular syllabus requirement.
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5(a) Define acids and alkalis
- Aqueous H+ and OH-
- Universal Indicator
5(b) Compare acidity and alkalinity
- Relative ion concentrations
- Indicator colours
- pH scale, no logarithmic calculation
5(c) Describe acid reaction patterns
- Metals, bases and carbonates
- Salt products
5(d) Explain neutralisation
- H+ + OH- -> water
5(e) Explain control of soil acidity
- Importance of soil pH
- Calcium hydroxide treatment
5(f) Describe base reactions
- With acids
- With ammonium salts on warming
5(g) Classify oxides
- Acidic, basic, amphoteric, neutral
- Metal/non-metal character and exceptions