Lesson 6.4. Ionic half equations

• Chemistry
• Secondary Education
• Age 12,13

Learning Resources Needed 

• Learning device (LessonUp.app)
• Learner's book, pages 132-137
• Notebook and writing pen
• Advance notes (if any)
• Phones in the basket, thanks

Lesson 6.4

Ionic half equations

Self-check: How do you feel today?

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What are we looking for?

• list down the products formed at the electrodes during the electrolysis of molten and aqueous compounds
• write ionic half-equations to show the reactions that occur at each electrode

Recap of 

Previous Lesson

Pop Quiz

Study the table 1 below:

Study the table 2 below:

Electrolysis of CuSO4

• list down the ions present in an aqueous copper (II) sulfate

Ions present in the following:

• dilute sodium chloride
• concentrated sodium chloride
• dilute sulfuric acid

Key Question

A quick Exercise for the Mind

Is a chemical reaction happening at each of the electrodes during electrolysis? How can you show this reaction using equations?

Study these equations:

Oxidation Reaction

• when a substance loses electrons

Reduction Reaction

• when a substance gains electrons

Ionic half equations

• show the oxidation and reduction of the ions involved

What type of reaction is each?

Collaborative work

Using shared knowledge

What will you do?

GROUP TASK

• show the reactions using ionic half-equations that happen at the anode and cathode during the electrolysis of the given aqueous solutions (from the table earlier)

Individual task

Applying what you've learned 

What will you do?

INDIVIDUAL TASK

• write the ionic half equations for the reaction at the cathode and anode during the electrolysis of concentrated aqueous copper (II) sulfate 

Self-check

Evaluating my own learning

Self-check: Rate, from 1 to 3, your performance and understanding of this lesson. (3 being highest)

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