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Solving Problems on the Nernst Equation
- 1. To solve problems on Nernst equation Learning Objective
- 2. Learning Outcomes • To solve numericals on cell reaction and Nernst equation.
- 3. How do we write a cell reaction? Lets start with the Construction of Daniell cell:
- 4. How do we write a cell reaction? Lets start with the Construction of Daniell cell: Can you mention the anode and cathode?
- 5. How do we write a cell reaction? The cell reaction is as follows: • This cell converts the chemical energy liberated during the redox reaction into electrical energy. • If an external opposite potential is applied and increased slowly, we find that the reaction continues to take place till the opposing voltage reaches the value 1.1 V. • The reaction stops altogether and no current flows through the cell.
- 6. How do we write a cell reaction? The cell reaction is as follows: • Zn(s) + Cu2+(aq) → Zn2+ (aq) + Cu(s) What do we write standard form of cell reaction?
- 7. How do we write a cell reaction? The cell reaction is as follows: • Zn(s) + Cu2+(aq) → Zn2+ (aq) + Cu(s) Zn | Zn2+ || Cu2+ | Cu Let us consider the left-hand side of the standard cell. Zn | Zn2+ • The Left-hand side is always the anode. • Oxidation takes place at the anode. • The half-cell with the more negative potential is always taken as the anode. • In oxidation there is always loss of electrons. Therefore the oxidation half-cell reaction is: Zn → Zn2+ + 2e-
- 8. How do we write a cell reaction? The cell reaction is as follows: • Zn(s) + Cu2+(aq) → Zn2+ (aq) + Cu(s) Zn | Zn2+ || Cu2+ | Cu Let us consider the left-hand side of the standard cell. Cu2+| Cu • The Right-hand side is always the cathode. • Reduction takes place at the cathode. • The half-cell with the more positive potential is always taken as the cathode. • In reduction there is always gain of electrons. Therefore the reduction half-cell reaction is: Cu2+ + 2e- → Cu
- 9. How do we write a cell reaction? So how do we write the overall cell reaction?
- 10. How do we write a cell reaction? We know that: Oxidation Reaction: Zn → Zn2+ + 2e- Reduction Reaction: Cu2+ + 2e- → Cu So, for overall reaction we add both the reactions together. The 2 electrons on both the sides of the half-cell get cancelled. Overall Reaction: Zn(s) + Cu2+(aq) → Zn2+ (aq) + Cu(s)
- 11. How do we write a cell reaction? Let us solve some examples:
- 12. How do we write a cell reaction? Let us solve some examples:
- 13. How do we write a cell reaction? Let us solve some examples:
- 14. How do we calculate the standard reduction potential? The standard reduction potential is given by: E0 cell= Ecathode - E The reduction potential of the cell is given by the nernst equation:
- 15. What do we calculate the standard reduction potential? Let us go through an example:
- 16. What do we calculate the standard reduction potential? Let us go through an example: Can you write the standard cell reaction?
- 17. What do we calculate the standard reduction potential? Let us go through an example: Can you write the overall reaction along with the half-cell reaction?
- 18. What do we calculate the standard reduction potential? Let us go through an example: Can you solve using the nernst equation and find the standard reduction potential?
- 19. What do we calculate the standard reduction potential? Let us go through an example:
- 20. What do we calculate the standard reduction potential? Let us go through an example: =
- 21. What do we calculate the standard reduction potential? Let us go through an example: = =
- 22. What do we calculate the standard reduction potential? Let us solve some examples: 1. 2. 3.
- 23. Learning Outcomes • To solve numericals on cell reaction and Nernst equation. How confident do you feel?
- 24. Learning Outcomes • To solve numericals on cell reaction and Nernst equation. How confident do you feel?
Editor's Notes
- An overview of the content of the lesson Must be in the form of a question where appropriate Students should be able to answer the question at the end - either fully, partly or in a way that demonstrates they understand what gaps in their knowledge they need to address Verbs such as to understand / to know / to gain confidence / to learn Ask students to give the question a go and point out that, at the end of the lesson, they should be able to answer fully
- An overview of the content of the lesson Must be in the form of a question where appropriate Students should be able to answer the question at the end - either fully, partly or in a way that demonstrates they understand what gaps in their knowledge they need to address Verbs such as to understand / to know / to gain confidence / to learn Ask students to give the question a go and point out that, at the end of the lesson, they should be able to answer fully
- An overview of the content of the lesson Must be in the form of a question where appropriate Students should be able to answer the question at the end - either fully, partly or in a way that demonstrates they understand what gaps in their knowledge they need to address Verbs such as to understand / to know / to gain confidence / to learn Ask students to give the question a go and point out that, at the end of the lesson, they should be able to answer fully
- An overview of the content of the lesson Must be in the form of a question where appropriate Students should be able to answer the question at the end - either fully, partly or in a way that demonstrates they understand what gaps in their knowledge they need to address Verbs such as to understand / to know / to gain confidence / to learn Ask students to give the question a go and point out that, at the end of the lesson, they should be able to answer fully
- An overview of the content of the lesson Must be in the form of a question where appropriate Students should be able to answer the question at the end - either fully, partly or in a way that demonstrates they understand what gaps in their knowledge they need to address Verbs such as to understand / to know / to gain confidence / to learn Ask students to give the question a go and point out that, at the end of the lesson, they should be able to answer fully
- An overview of the content of the lesson Must be in the form of a question where appropriate Students should be able to answer the question at the end - either fully, partly or in a way that demonstrates they understand what gaps in their knowledge they need to address Verbs such as to understand / to know / to gain confidence / to learn Ask students to give the question a go and point out that, at the end of the lesson, they should be able to answer fully
- An overview of the content of the lesson Must be in the form of a question where appropriate Students should be able to answer the question at the end - either fully, partly or in a way that demonstrates they understand what gaps in their knowledge they need to address Verbs such as to understand / to know / to gain confidence / to learn Ask students to give the question a go and point out that, at the end of the lesson, they should be able to answer fully
- An overview of the content of the lesson Must be in the form of a question where appropriate Students should be able to answer the question at the end - either fully, partly or in a way that demonstrates they understand what gaps in their knowledge they need to address Verbs such as to understand / to know / to gain confidence / to learn Ask students to give the question a go and point out that, at the end of the lesson, they should be able to answer fully
- An overview of the content of the lesson Must be in the form of a question where appropriate Students should be able to answer the question at the end - either fully, partly or in a way that demonstrates they understand what gaps in their knowledge they need to address Verbs such as to understand / to know / to gain confidence / to learn Ask students to give the question a go and point out that, at the end of the lesson, they should be able to answer fully
- An overview of the content of the lesson Must be in the form of a question where appropriate Students should be able to answer the question at the end - either fully, partly or in a way that demonstrates they understand what gaps in their knowledge they need to address Verbs such as to understand / to know / to gain confidence / to learn Ask students to give the question a go and point out that, at the end of the lesson, they should be able to answer fully
- An overview of the content of the lesson Must be in the form of a question where appropriate Students should be able to answer the question at the end - either fully, partly or in a way that demonstrates they understand what gaps in their knowledge they need to address Verbs such as to understand / to know / to gain confidence / to learn Ask students to give the question a go and point out that, at the end of the lesson, they should be able to answer fully
- An overview of the content of the lesson Must be in the form of a question where appropriate Students should be able to answer the question at the end - either fully, partly or in a way that demonstrates they understand what gaps in their knowledge they need to address Verbs such as to understand / to know / to gain confidence / to learn Ask students to give the question a go and point out that, at the end of the lesson, they should be able to answer fully
- An overview of the content of the lesson Must be in the form of a question where appropriate Students should be able to answer the question at the end - either fully, partly or in a way that demonstrates they understand what gaps in their knowledge they need to address Verbs such as to understand / to know / to gain confidence / to learn Ask students to give the question a go and point out that, at the end of the lesson, they should be able to answer fully
- An overview of the content of the lesson Must be in the form of a question where appropriate Students should be able to answer the question at the end - either fully, partly or in a way that demonstrates they understand what gaps in their knowledge they need to address Verbs such as to understand / to know / to gain confidence / to learn Ask students to give the question a go and point out that, at the end of the lesson, they should be able to answer fully
- An overview of the content of the lesson Must be in the form of a question where appropriate Students should be able to answer the question at the end - either fully, partly or in a way that demonstrates they understand what gaps in their knowledge they need to address Verbs such as to understand / to know / to gain confidence / to learn Ask students to give the question a go and point out that, at the end of the lesson, they should be able to answer fully
- An overview of the content of the lesson Must be in the form of a question where appropriate Students should be able to answer the question at the end - either fully, partly or in a way that demonstrates they understand what gaps in their knowledge they need to address Verbs such as to understand / to know / to gain confidence / to learn Ask students to give the question a go and point out that, at the end of the lesson, they should be able to answer fully
- An overview of the content of the lesson Must be in the form of a question where appropriate Students should be able to answer the question at the end - either fully, partly or in a way that demonstrates they understand what gaps in their knowledge they need to address Verbs such as to understand / to know / to gain confidence / to learn Ask students to give the question a go and point out that, at the end of the lesson, they should be able to answer fully
- An overview of the content of the lesson Must be in the form of a question where appropriate Students should be able to answer the question at the end - either fully, partly or in a way that demonstrates they understand what gaps in their knowledge they need to address Verbs such as to understand / to know / to gain confidence / to learn Ask students to give the question a go and point out that, at the end of the lesson, they should be able to answer fully
- An overview of the content of the lesson Must be in the form of a question where appropriate Students should be able to answer the question at the end - either fully, partly or in a way that demonstrates they understand what gaps in their knowledge they need to address Verbs such as to understand / to know / to gain confidence / to learn Ask students to give the question a go and point out that, at the end of the lesson, they should be able to answer fully
- An overview of the content of the lesson Must be in the form of a question where appropriate Students should be able to answer the question at the end - either fully, partly or in a way that demonstrates they understand what gaps in their knowledge they need to address Verbs such as to understand / to know / to gain confidence / to learn Ask students to give the question a go and point out that, at the end of the lesson, they should be able to answer fully
- An overview of the content of the lesson Must be in the form of a question where appropriate Students should be able to answer the question at the end - either fully, partly or in a way that demonstrates they understand what gaps in their knowledge they need to address Verbs such as to understand / to know / to gain confidence / to learn Ask students to give the question a go and point out that, at the end of the lesson, they should be able to answer fully
- An overview of the content of the lesson Must be in the form of a question where appropriate Students should be able to answer the question at the end - either fully, partly or in a way that demonstrates they understand what gaps in their knowledge they need to address Verbs such as to understand / to know / to gain confidence / to learn Ask students to give the question a go and point out that, at the end of the lesson, they should be able to answer fully
- An overview of the content of the lesson Must be in the form of a question where appropriate Students should be able to answer the question at the end - either fully, partly or in a way that demonstrates they understand what gaps in their knowledge they need to address Verbs such as to understand / to know / to gain confidence / to learn Ask students to give the question a go and point out that, at the end of the lesson, they should be able to answer fully
- An overview of the content of the lesson Must be in the form of a question where appropriate Students should be able to answer the question at the end - either fully, partly or in a way that demonstrates they understand what gaps in their knowledge they need to address Verbs such as to understand / to know / to gain confidence / to learn Ask students to give the question a go and point out that, at the end of the lesson, they should be able to answer fully