L9. Corrosion of metals

Lesson 9
Corrosion of metals

04-10-2022
1 / 33
volgende
Slide 1: Tekstslide
ChemSecondary Education

In deze les zitten 33 slides, met interactieve quizzen en tekstslides.

Onderdelen in deze les

Lesson 9
Corrosion of metals

04-10-2022

Slide 1 - Tekstslide

Choose an emoji to tell us how you feel today.
šŸ˜’šŸ™šŸ˜šŸ™‚šŸ˜ƒ

Slide 2 - Poll

  • state the conditions required for the rusting of iron and steel to form hydrated iron(III) oxide
  • identify some common methods of preventing the rusting of iron and steel and corrosion of other metals
  • describe how these methods work
Success Criteria

Slide 3 - Tekstslide

Language 
development

Slide 4 - Tekstslide

  • rust
  • corrosion
  • corrode
  • barrier methods
  • painting 
Know the keywords
  • oiling and greasing
  • plastic coatings
  • electroplating
  • galvanising and sacrificial protection

Slide 5 - Tekstslide

  • An in-class interactive, friendly competition which promotes teamwork, critical thinking, investigative learning, and determination.
  • The competition can be:
- A quiz bee / quiz show
- Practical work
- Positive behaviour
  • A team can earn points by winning or performing well in the activities. A team can get point deductions by not following instructions, messy work table, cheating, etc.
CHEMPETITION !

Slide 6 - Tekstslide

Slide 7 - Tekstslide

  • As a team, you will be given a copy of the concept notes.
  • You have 10 minutes to read, understand, and ask questions to the teacher.
  • You will have to return the copies to the teacher. 
  • LessonUp will be used as our quiz tool today.
  • Only one device is needed per team.
  • The team which turns out to be first will be declared the champion for this game.
CHEMPETITION !

Slide 8 - Tekstslide

  • Questions will be based on the readings you did and with the session topic.
  • This is a list of the total points you will earn: 
Champion = 5 points
2nd place = 3 points
3rd place = 2 points
non-winners = 1 point
CHEMPETITION !

Slide 9 - Tekstslide

timer
10:00

Slide 10 - Tekstslide

Preparation 
Time
timer
1:00

Slide 11 - Tekstslide

_____ is a chemical reaction between iron, water, and oxygen to form rust.
A
Rusting
B
Galvanising
C
Sacrificial protection
D
Electroplating

Slide 12 - Quizvraag

What is the chemical name of rust?
A
iron (III) hydroxide
B
iron (II) oxide
C
iron (II) hydroxide
D
iron (III) oxide

Slide 13 - Quizvraag

What two conditions must be present for rust to occur?
A
oxygen and carbon
B
oxygen and water
C
oxygen and nitrogen
D
sodium and water

Slide 14 - Quizvraag

Iron can be prevented from rusting using the _______ series.
A
reaction
B
reactivity
C
metallic
D
sequential

Slide 15 - Quizvraag

Which of the following is NOT an example of a common barrier that prevent the iron from coming in contact with water and oxygen?
A
grease
B
oil
C
paint
D
zinc

Slide 16 - Quizvraag

Barrier methods are permanent protection.
A
TRUE
B
FALSE

Slide 17 - Quizvraag

Based on the investigation results shown in the diagram, which of the following the is MOST successful method?
A
use of oil
B
use of sodium chloride
C
use of water

Slide 18 - Quizvraag

Why did the nail in water with NO air not show any sign of rust?
timer
1:00

Slide 19 - Open vraag

During rusting, iron is _________.
A
reduced
B
ionised
C
atomised
D
oxidised

Slide 20 - Quizvraag

Iron is to rust ; Steel is to corrode.
A
TRUE
B
FALSE

Slide 21 - Quizvraag

A more reactive metal can be attached to a less reactive metal.
A
TRUE
B
FALSE

Slide 22 - Quizvraag

Which of the following metals CANNOT be used as a sacrificial protection to iron?
A
aluminium
B
copper
C
magnesium
D
zinc

Slide 23 - Quizvraag

Which of the following metals corrodes first?
A
aluminium
B
copper
C
magnesium
D
zinc

Slide 24 - Quizvraag

What two things happen to a more reactive metal if used as sacrificial protection?
A
will be oxidised and corrode last
B
will be oxidised and corrode first
C
will be reduced and corrode last
D
will be reduced and corrode first

Slide 25 - Quizvraag

How does a more reactive metal protect a less reactive metal?
timer
1:00

Slide 26 - Open vraag

Zinc is a reactive metal. What happens to its outermost electrons?
A
disappear
B
wasted
C
removed easily
D
given off

Slide 27 - Quizvraag

_____ is a process where the iron to be protected is coated with a layer of zinc.
A
Coating
B
Rusting
C
Galvanising
D
Electrolysis

Slide 28 - Quizvraag

What method is used to galvanise iron with zinc?
A
electroplating
B
galvanising
C
dipping it into molten lava
D
electrolyse

Slide 29 - Quizvraag

What compound is formed when zinc reacts with oxygen and carbon dioxide in the air?
A
zinc carbonate
B
zinc oxide
C
zinc hydroxide
D
zinc plate

Slide 30 - Quizvraag

Slide 31 - Tekstslide

  • Wednesday - Extraction of iron
  • Thursday - NO SCHEDULED CLASS
  • Friday - Extraction of aluminium
Up next!

Slide 32 - Tekstslide

Self - Evaluation
šŸ˜ - I can do this! I am ready to try something new.
šŸ˜… - I am getting there! I need a bit of help. I am a bit unsure. I might need to practice.
šŸ˜¬ - I need help! I don't understand this. I am not ready to move on yet.
timer
1:00
šŸ˜
šŸ˜…
šŸ˜¬

Slide 33 - Poll