Topic 7 - Corrosion

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Topic 7 - Corrosion
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Topic 7 Corrosion

• Lesson 1/2
• These outcomes relate to the
• PowerPoint Slides 1-4 on Corrosion

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Topic 7 Corrosion Lesson 1/2

• What is corrosion?
• Do all metals corrode?
• What term is used for iron corroding?
• What causes corrosion?
• What can speed up rusting?

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Topic 7 Corrosion Lesson 1/2

• How does this speed up rusting?
• What is the formula for the iron compound formed
  in corrosion?
• What ion is formed in the first stage of iron
  corroding?
• What type of reaction is this?

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Topic 7 Corrosion

• Lesson 2/3
• These outcomes relate to the
• PowerPoint Slides 5-8 on Corrosion

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Topic 7 Corrosion Lesson 2/3

• What chemical test can detect the iron rusting?
  What are the results?
• What ion does the test detect?
• What is oxidation?
• What ion is formed in the first stage of rusting?

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Topic 7 Corrosion Lesson 2/3

• What ion is formed in the second stage of
  rusting?
• What ion is produced when oxygen and water pick
  up electrons?
• What type of reaction is this?
• What indicator turns pink with these ions?

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Topic 7 Corrosion

• Lesson 3/4
• These outcomes relate to the
• PowerPoint Slides 11-14 on Corrosion

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Topic 7 Corrosion Lesson 3/4

• When iron is connected to copper in a cell, why
  does it rust?
• How can this be shown by experiment?
• When iron is connected to magnesium in a cell why
  does it not rust?
• How can you tell by experiment?

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Topic 7 Corrosion

• Lesson 4/5
• At this point consolidate all you know
• so far using Slide 15 and
• Assessment 12.2 from the pink textbook

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Topic 7 Corrosion

• Lesson 5/6
• These outcomes relate to the
• PowerPoint Slides 16-19 on Corrosion

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Topic 7 Corrosion Lesson 5/6

• What ways can iron be physically protected?
• Why, if tin is scratched, does iron rust faster?
• In electroplating, what terminal is iron coated
  with a metal?
• What type of reaction occurs here?

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Topic 7 Corrosion

• Lesson 6/7
• These outcomes relate to the
• PowerPoint Slides 20-22 on Corrosion

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Topic 7 Corrosion Lesson 6/7

• What ways can iron be chemically protected?
• What is galvanising?
• Why can galvanising supply physical and chemical
  protection?
• What metal is generally used in sacrificial
  protection?

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Topic 7 Corrosion Lesson 6/7

• In terms of electrons, why is iron protected by
  coating with zinc or placing close to magnesium?

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Topic 7 Corrosion

• Lesson 7/8
• At this point consolidate all you
• Know so far using Slide 22 and
• Assessment 12.1 from the pink
• textbook

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Topic 7 Corrosion

• Lesson 8/9
• No Power Point exists for the last few learning
  outcomes.
• Relates to Workbook 7.9 Core

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Topic 7 Cells Lesson 8/9

• What is a cell?
• What is an ion-bridge needed for?
• Which way do electrons flow when zinc is
  connected to a carbon rod in an acid solution?
• What type of reaction is this?

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Topic 7 Cells Lesson 8/9

• Can you write this ion-electron equation?
• What is happening to the hydrogen ions?
• What type of reaction is this?
• Can you write this ion-electron equation?

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Topic 7 Cells Lesson 8/9

• What type of rods can connect non-metal
  solutions together?
• When iodine solution is connected to the sulphite
  ion solution , what happens to the iodine?
• Can you write the ion-electron equation for this?

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Topic 7 Cells Lesson 8/9

• What type of reaction is this?
• What happens to the sulphite ion?
• Can you write the ion-electron equation for this?
• What type of reaction is this?