AgNO₃ vs BaCl₂ Trick 🔥 | Coordination Isomerism
❓ Question Given complex: Co ⋅ 5 N H 3 ⋅ C l ⋅ S O 4 \text{Co} \cdot 5NH_3 \cdot Cl \cdot SO_4 Two isomers A and B: A gives white ppt with AgNO₃ B gives white ppt with BaCl₂ Find the type of isomerism . 🖼 Question Image ✍️ Short Concept Precipitation reactions help identify which ion is outside the coordination sphere . 👉 AgNO₃ detects Cl⁻ 👉 BaCl₂ detects SO₄²⁻ 🔷 Step 1 — Understand the Tests 💯 AgNO₃ test: C l − → A g C l ( w h i t e p p t ) Cl^- \rightarrow AgCl (white ppt) BaCl₂ test: S O 4 2 − → B a S O 4 ( w h i t e p p t ) SO_4^{2-} \rightarrow BaSO_4 (white ppt) 👉 These ions must be free (outside) to react. 🔷 Step 2 — Analyze Isomer A A gives ppt with AgNO₃ So: C l − is outside coordination sphere Cl^- \text{ is outside coordination sphere} Structure: [ C o ( N H 3 ) 5 S O 4 ] C l [Co(NH_3)_5SO_4]Cl 🔷 Step 3 — Analyze Isomer B B gives ppt with BaCl₂ So: S O 4 2 − is outside SO_4^{2-} \text{ is outsid...