Ionic Equilibrium — Class 12 Chemistry (Samacheer Kalvi)
TN State Board (Samacheer Kalvi) Class 12 Chemistry, Chapter 8. Buffer solutions, solubility product and common ion effect.
1. About this chapter
This chapter covers Ionic Equilibrium as part of the Class 12 Samacheer Kalvi Chemistry curriculum. It deals with buffer solutions, solubility product and common ion effect and builds conceptual understanding essential for the TN HSC Public Exam.
By the end of this chapter, students will be able to:
- Calculate pH of buffer solutions
- Apply Ksp and common ion effect
2. Key concepts
- Concept 1: Calculate pH of buffer solutions.
- Concept 2: Apply Ksp and common ion effect.
3. Important terms and formulas
| Term / Formula | Description |
|---|---|
| Calculate pH of buffer… | Calculate pH of buffer solutions |
| Apply Ksp and common… | Apply Ksp and common ion effect |
4. Worked examples
Example 1. Applying a key concept from this chapter.
Solution: Identify the relevant principle → apply the formula or rule → state the answer with correct units.
Example 2. A typical exam-style question on ionic equilibrium.
Solution: Break the problem into steps, use the appropriate formula and verify the answer.
5. Common mistakes
- Mistake: Skipping units or forgetting to state them. Fix: Always write units alongside every quantity and answer.
- Mistake: Confusing similar terms or concepts in this chapter. Fix: Make a comparison table of the terms during revision.
6. Practice (exam-style)
- Define the main term or principle covered in Chapter 8.
- Give two real-life examples related to ionic equilibrium.
- Solve a short numerical or descriptive question from this chapter.
- State one important formula and explain each symbol.
7. Answer key (hints)
- Refer to section 2 (Key concepts) above for the definition.
- Examples should be drawn from daily experience and local context.
- Apply the formula from section 3, show all steps clearly.
- Formula with units — refer to the textbook glossary for symbol meanings.
8. Quick revision
- Class 12 Chemistry — Chapter 8: Ionic Equilibrium.
- Core idea: Buffer solutions, solubility product and common ion effect.
- Key outcomes: Calculate pH of buffer solutions; Apply Ksp and common ion effect.
- Always revise diagrams / tables from the Samacheer Kalvi textbook before the exam.
