🎯 Objective
Identify the unknown salt by detecting one cation and one anion through systematic qualitative analysis.
Unknown Salt
❓
White crystalline powder
Your Conclusion
Run at least one anion and one cation test, then deduce the ions yourself from what you observed.
Anion Detection Tests
🔥 Flame Colors
Na⁺ (Golden)
K⁺ (Violet)
Ca²⁺ (Brick red)
Cu²⁺ (Green)
Ba²⁺ (Apple green)
⚠️ Safety
- Concentrated H₂SO₄ is highly corrosive and the gases (HCl, SO₂) are choking — work in a fume cupboard, add acid carefully.
- Barium chloride is toxic if swallowed — wash hands, never taste.
- Silver nitrate stains skin black and is corrosive — collect as silver/heavy-metal waste, not down the sink.
- NaOH / NH₄OH are corrosive; ammonia vapour is pungent — smell gently by wafting only.
- Flame test — use a Bunsen safely, tie back hair, hold the wire with tongs; hot wire looks like cold wire.
Lab Notebook
Observations will appear here...