This memory aid covers Memory Aid within Tests for Ions for GCSE Chemistry. Revise Tests for Ions in Chemical Analysis for GCSE Chemistry with 20 exam-style questions and 14 flashcards. This topic appears regularly enough that it should still be part of a steady revision cycle. It is section 10 of 14 in this topic. Use it for quick recall, then test yourself straight afterwards so the memory aid becomes usable in an answer.
Topic position
Section 10 of 14
Practice
20 questions
Recall
14 flashcards
🧠 Memory Aid
"NaOH for METALS, BaCl₂ for SULFATES, AgNO₃ for HALIDES"
Precipitate colours with NaOH: "Cu = Blue, Fe2 = Green, Fe3 = Brown, Al/Ca = White"
Silver halide colours: "White, Cream, Yellow — going down the halogen group"
- Cl⁻ = White
- Br⁻ = Cream
- I⁻ = Yellow
- Remember: "Why (Y) does Cream come between?" — White, Cream, Yellow
Quick Check: A solution gives a brown precipitate when sodium hydroxide is added. What metal ion is present?
Iron III ion (Fe³⁺). It forms brown/orange Fe(OH)₃ precipitate with sodium hydroxide.