🧪 Precipitation Reactions Produce Insoluble Salts
अवक्षेपण अभिक्रियाएँ अघुलनशील लवण बनाती हैं
1️⃣ Description / परिचय
English
A precipitation reaction is a chemical reaction in which two aqueous solutions react to form an insoluble solid salt called a precipitate.हिन्दी
अवक्षेपण अभिक्रिया वह रासायनिक अभिक्रिया है जिसमें दो जलीय विलयन आपस में अभिक्रिया करके अघुलनशील ठोस लवण बनाते हैं। इस ठोस पदार्थ को अवक्षेप (Precipitate) कहते हैं।
AgNO₃(aq) + NaCl(aq)
→ AgCl(s)↓ + NaNO₃(aq)
⭐ Key Point:
Precipitation Reaction → Insoluble Salt → Precipitate
अवक्षेपण अभिक्रिया → अघुलनशील लवण → अवक्षेप
Precipitation Reaction → Insoluble Salt → Precipitate
अवक्षेपण अभिक्रिया → अघुलनशील लवण → अवक्षेप
2️⃣ Attractive Animation / Animation द्वारा समझें
AgNO₃ + NaCl → AgCl↓ + NaNO₃
Ag⁺
Cl⁻
Na⁺
NO₃⁻
↔
Ag⁺ + Cl⁻ → AgCl↓ (White Insoluble Precipitate)
3️⃣ Concept / अवधारणा
Step 1:
दो aqueous solutions लिए जाते हैं।
Two aqueous solutions are taken.
Two aqueous solutions are taken.
Step 2:
दोनों solutions को mix किया जाता है।
The solutions are mixed.
The solutions are mixed.
Step 3:
Ions exchange करते हैं।
The ions exchange their partners.
The ions exchange their partners.
Step 4:
यदि कोई insoluble salt बनता है तो वह नीचे बैठ जाता है।
If an insoluble salt is formed, it appears as a precipitate.
If an insoluble salt is formed, it appears as a precipitate.
AB + CD → AD↓ + CB
4️⃣ Important Example / महत्वपूर्ण उदाहरण
Silver Nitrate + Sodium Chloride
AgNO₃(aq) + NaCl(aq)
→ AgCl(s)↓ + NaNO₃(aq)
Step 1 — Ions identify करें:
AgNO₃ → Ag⁺ + NO₃⁻
NaCl → Na⁺ + Cl⁻
Step 2 — Ion exchange:
Ag⁺ + Cl⁻ → AgCl
Na⁺ + NO₃⁻ → NaNO₃
Step 3 — Insoluble product:
AgCl पानी में insoluble है।
Step 4 — Observation:
White precipitate of AgCl is formed.
Final: यह precipitation reaction है क्योंकि insoluble AgCl बनता है।
AgNO₃ → Ag⁺ + NO₃⁻
NaCl → Na⁺ + Cl⁻
Step 2 — Ion exchange:
Ag⁺ + Cl⁻ → AgCl
Na⁺ + NO₃⁻ → NaNO₃
Step 3 — Insoluble product:
AgCl पानी में insoluble है।
Step 4 — Observation:
White precipitate of AgCl is formed.
Final: यह precipitation reaction है क्योंकि insoluble AgCl बनता है।
5️⃣ Important Precipitation Equations
AgNO₃ + NaCl → AgCl↓ + NaNO₃
AgCl = White precipitate
BaCl₂ + Na₂SO₄ → BaSO₄↓ + 2NaCl
BaSO₄ = White precipitate
Pb(NO₃)₂ + 2KI → PbI₂↓ + 2KNO₃
PbI₂ = Yellow precipitate
AgNO₃ + KBr → AgBr↓ + KNO₃
AgBr = Pale yellow precipitate
6️⃣ Soluble और Insoluble Salts
| Salt | Nature | Observation |
|---|---|---|
| AgCl | Insoluble | White precipitate |
| BaSO₄ | Insoluble | White precipitate |
| PbI₂ | Insoluble | Yellow precipitate |
| NaNO₃ | Soluble | Remains in solution |
| KNO₃ | Soluble | Remains in solution |
7️⃣ 50 MCQs — CBSE + Foundation + Competitive
8️⃣ 2 Marks — 10 Questions with Solutions
9️⃣ 3 Marks — 10 Questions with Solutions
🔟 4 Marks — 10 Questions with Solutions
1️⃣1️⃣ 5 Marks — 10 Questions with Solutions
1️⃣2️⃣ 6 Marks — 10 Questions with Solutions
1️⃣3️⃣ Assertion–Reason — 10 Questions
1️⃣4️⃣ Quick Revision / त्वरित Revision
Precipitation Reaction:
Two aqueous solutions ↓ Ion exchange ↓ Insoluble salt ↓ Precipitate
Two aqueous solutions ↓ Ion exchange ↓ Insoluble salt ↓ Precipitate
Ag⁺ + Cl⁻ → AgCl↓
⭐ याद रखें:
Precipitate = Insoluble solid
AgCl = White
BaSO₄ = White
PbI₂ = Yellow
Precipitate = Insoluble solid
AgCl = White
BaSO₄ = White
PbI₂ = Yellow
🏆 Final CBSE Concept
PRECIPITATION REACTION
Two aqueous solutions ↓ Ions exchange ↓ Insoluble salt forms ↓ Solid precipitate appears
AgNO₃ + NaCl ↓ AgCl↓ + NaNO₃
AgCl = White Insoluble Precipitate
अवक्षेपण अभिक्रिया में अघुलनशील लवण अवक्षेप के रूप में बनता है।
Two aqueous solutions ↓ Ions exchange ↓ Insoluble salt forms ↓ Solid precipitate appears
AgNO₃ + NaCl ↓ AgCl↓ + NaNO₃
AgCl = White Insoluble Precipitate
अवक्षेपण अभिक्रिया में अघुलनशील लवण अवक्षेप के रूप में बनता है।