chemical eq 3

 Thanks, Mayank! Here's a clear, exam-friendly, and student-focused explanation of the concept you're covering in Activity 1.1, leading naturally into word equations and how they represent chemical reactions in a simplified way.

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🧪 Understanding Chemical Reactions Through Word Equations

(Activity 1.1 – Magnesium burns in air)

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🔥 What Happens in Activity 1.1?

When a strip of magnesium ribbon is burnt in air, it reacts with oxygen and forms a new substance — magnesium oxide, which appears as white ash.

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🧠 How Do We Describe This Reaction?

In sentence form:

“When magnesium is burned in oxygen, it forms magnesium oxide.”

But this is too long and not useful for scientific writing.

So, we use a word equation instead:

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✍️ Word Equation:

$$\text{Magnesium} + \text{Oxygen} \rightarrow \text{Magnesium oxide}$$

✅ This is short, clear, and shows the transformation.

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🔄 Understanding the Parts of a Word Equation

Term	Meaning
Reactants	Substances that take part in the reaction (on the left side)
Products	Substances that are formed during the reaction (on the right side)
Arrow (→)	Shows the direction of the reaction (from reactants to products)
Plus (+)	Used to separate multiple substances on either side of the equation

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📘 In This Case:

• Magnesium and oxygen are reactants

• Magnesium oxide is the product

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🧠 Why Use Word Equations?

✅ They help beginner students easily understand what’s reacting and what’s forming, without needing to memorize chemical formulas right away.

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📝 CBSE Exam Tip:

• A 1-mark question may ask:
  "Write the word equation for the burning of magnesium."

Answer:
Magnesium + Oxygen → Magnesium oxide

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🎤 Final Thought for Students:

“A word equation is like a simple sentence that tells the story of a chemical reaction — who came together and what they created.”

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Would you like this converted into a classroom worksheet with practice word equations for students?