Topic 1 · pp. 83–84 · Free
Topic Notes · Easy summaries with diagrams
Chapter 6 — Chapter 6 — Equilibria
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📘Easy summary
An irreversible reaction goes to completion in the forward direction only (NaCl + AgNO₃ → AgCl + NaNO₃). A reversible reaction moves in both directions under the same conditions and is shown by ⇌: N₂ + 3H₂ ⇌ 2NH₃ (400 °C, 200 atm). All species are present together; it never goes to completion.
⭐Key points
- A reversible reaction goes to completion if a product is withdrawn or escapes as gas.
- CaCO₃ ⇌ CaO + CO₂: open container → complete; closed → equilibrium.
- Majority of reactions are reversible.
🔬Diagram
🌿Real-life example
Heating limestone in an open kiln gives complete conversion to lime.
💡Exam tip
- Open vessel + gaseous product → completion (MCQ iv).
✅Quick check
1. Symbol of reversible reaction:
2. CaCO₃ decomposes completely in a:
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