ORDER OF REACTION: Definition + Experimental Method | Zero to Negative Order

Описание: *Title:* ORDER OF REACTION: Definition + Experimental Method | Zero to Negative Order 🧪

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*Description:*

Assalam-u-Alaikum! Welcome back to **Chemistry WALLAH**! 🌟

In today's comprehensive lecture, we dive deep into the *Order of Reaction* from *Chemical Kinetics* – a fundamental concept that every chemistry student must master!

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📚 What You'll Learn:

*🔹 Introduction to Order of Reaction*
Understanding why order matters in chemical kinetics

*🔹 Definition of Order of Reaction* ⭐
The sum of powers of concentration terms in the rate law expression

I explain this definition in the simplest way possible with practical examples.

*🔹 General Reaction and Rate Equation*
Using a general reaction to derive the rate equation step-by-step

*🔹 Experimental Calculation Method* 🧮
Learn HOW to calculate order by:
Changing one concentration while keeping others constant
Observing rate changes
Determining order from experimental data

*🔹 Key Concept: Order is EXPERIMENTAL* 🧪
I emphasize: Order of Reaction can ONLY be determined through **experimental data**, not from the balanced chemical equation!

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📊 All Possible Values of Order:

✅ *Zero Order* – Rate independent of concentration
✅ *First Order* – Rate ∝ concentration
✅ *Second Order* – Rate ∝ (concentration)²
✅ *Third Order* – Rare but possible
✅ *Fractional Order* – Orders can be in fractions!
✅ *Negative Order* – Increasing concentration DECREASES rate – I explain the science behind this fascinating phenomenon!

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🌡️ Effect of External Factors:

How changing these affects Order:
Concentration
Pressure
Volume
Temperature

When these factors change, the Order itself can change!

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🎯 Who Is This Lecture For?

*🇵🇰 Pakistani Students:*
Following curriculum of:
Peshawar Board (Textbook Board Peshawar)
Federal Board (Islamabad)
Punjab Board
Balochistan Board
Sindh Board
All Pakistani boards

*🇮🇳 Indian Students:*
Perfect for competitive exams:
NEET (National Eligibility cum Entrance Test)
JEE Mains and Advanced
Kota Curriculum
All state boards

*🌍 Worldwide:*
SAT Chemistry
AP Chemistry
A-Levels
IB Chemistry
GCSE and O-Levels
University entrance exams

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👨‍🔬 About Chemistry WALLAH

I'm passionate about making *Chemistry simple* for every student. On this channel, I focus on *secondary-level Chemistry* but my content helps learners at ALL levels.

*My mission:* No student should fear Chemistry. Every concept can be explained with patience and clarity!

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📌 Channel Details:

*Channel Name:* Chemistry WALLAH
*Channel Handle:* @ChemistryWALLAH120
*Spelling:* C H E M I S T R Y W A L L A H 1 2 0

*Subscribe now* for more high-quality chemistry lectures! 🔔

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⏱️ Quick Timestamps:

0:00 – Introduction
1:30 – Chemical Kinetics Basics
3:45 – Introduction to Order
7:20 – Definition of Order
12:00 – General Reaction Example
16:30 – Rate Equation Explained
22:15 – How to Calculate Order
28:40 – Experimental Data Method
35:00 – Zero Order
39:20 – First Order
43:10 – Second Order
47:30 – Third Order
50:15 – Fractional Order
53:40 – Negative Order (Must Watch!)
58:00 – External Factors Effect
1:02:30 – Summary
1:05:00 – Conclusion

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🧪 Key Takeaways:

1. Order = Sum of powers in rate law
2. It is *EXPERIMENTAL* – never guess from equation!
3. Order can be: 0, 1, 2, 3, Fractional, NEGATIVE
4. Negative order = increasing concentration DECREASES rate
5. External factors can change the order

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📚 Recommended Playlist:

▶️ Chemical Kinetics – Full Chapter
▶️ Rate of Reaction – Complete Guide
▶️ Rate Law Expression
▶️ Half-Life Methods

Links in pinned comment!

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❓ Frequently Asked Questions:

*Q: Can order be zero?*
A: YES! When rate is independent of concentration.

*Q: How to find order experimentally?*
A: Change one concentration at a time and observe rate changes – as shown in this video!

*Q: Is order always a whole number?*
A: NO! Order can be fractional (like 1/2, 3/2) and even negative.

*Q: Why does negative order happen?*
A: When a reactant inhibits the reaction, increasing its concentration slows it down.

*Q: Can order change during reaction?*
A: Yes, if conditions change significantly.

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🔔 *Subscribe* to the channel
👍 *Like* this video
💬 *Comment* your questions below
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I personally reply to every comment!

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📝 Homework for You:

After watching this video:
1. Write the definition in your own words
2. Find 3 examples of zero-order reactions
3. Explain why negative order is possible
4. Comment your biggest takeaway!

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🏆 For Competitive Exams:

**NEET, JEE, MDCAT, ECAT as memorization. Master the Order of Reaction today, a