Why certain metals are only selected for particular jobs?

Reactivity Series�

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Reaction of metals with water

Observe the reactions and record your observations

Observe the reactions and record your observations

Copper + water

Magnesium + water

Sodium + water

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Observe the reactions and record your observations

Discuss in groups and write:

1. Which metal reacts with cold water vigorously?
2. Which gas is formed as a result of this reaction?
3. Write down its chemical reaction.
4. Which metal does not react with cold and hot water?
5. Based on your observation, arrange these metals in the decreasing order of reactivity.

Sodium

Hydrogen

Na>Mg> Cu

Copper

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Reactivity Series

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Write the word equation for the reaction of calcium with water.

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Calcium + water 🡪 Calcium hydroxide +hydrogen

Now it is your turn!

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Why has Tutankhamun’s mask never tarnished?

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Why is the statue of liberty green?

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Reaction of metals with air

Copper

Sodium

Magnesium

Aluminium

Gold

Does the shining of gold fade even after a long time?

Which metal among magnesium, copper, gold, sodium and aluminium loses its luster at a faster rate?

Think – Pair - Share

List the above metals in the decreasing order of their reactivity with air and there by losing luster.

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Metal + Oxygen 🡪 _ _ _ _ _

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Metal oxide

Sodium

No

Na>Mg>Al>Cu>Au

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What will happen if magnesium expose to air for few days?

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Now it is your turn!

Do all metals react with acids in the same way?

Reaction of meals with acids

Analyse the reactions and arrange these metals in the decreasing order of their rate of chemical reaction.

Discuss:

1.Bubbles of the test tube indicates the formation of ----------

2.Do all metals react with acids in the same way?

3.Metal + Acids 🡪 _ _ _ _ _ _ + _ _ _ _ _ .

4.Observe the picture and arrange the metals in the decreasing order of reaction.

5.What do you understand from all the reactions of metals with water, air and acid?

Reactivity Series�

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The series obtained by arranging some of the metals in the decreasing order of their reactivity. This is known as the reactivity series.

Hydrogen is also included in this series for the sake of comparison of chemical reactivity.

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Reactivity Series

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Now it is your turn!

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1. Which gas is produced when a metal reacts with water?

• Oxygen
• Hydrogen
• Nitrogen

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Your turn!

Excellent!�…..You are right� click here to go to next slide

Wrong Answer!�…..Try again

click here to go back

2. Which metal is more reactive with water?

• Sodium
• Magnesium

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Your turn!

Excellent!�…..You are right� click here to go to next slide

Wrong Answer!�…..Try again

click here to go back

3. Which metal is at the bottom of the reactivity series

• Gold
• Magnesium

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Your turn!

Excellent!�…..You are right� click here to go to next slide

Wrong Answer!�…..Try again

click here to go back

Consolidation and Review

Review

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1. What is the reactivity series of metals?

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• What will happen when metals reacts with acid?

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• Name one metal which is highly reactive with water.

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Follow up activities

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1. Write the general equations for metal react with water, air and acid.

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• Prepare a tabular chart of the reactivity series.

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