Chemistry Year 12 - Module 6 - Lesson 14
Titration — Standard Solutions, Technique & Calculations
1. Key Ideas
Winemakers have used acid-base titration to measure wine acidity for over a century — the same procedure you will perform in the HSC prescribed investigation, the same four-step calculation, and the same sources of error that professional oenologists manage every day in production laboratories.
- A standard solution has accurately known concentration
- Why NaOH and HCl cannot be primary standards
2. Success Criteria
By the end, you should be able to:
- A standard solution has accurately known concentration
- Primary standards must be: pure, stable, non-hygroscopic, soluble, high molar mass
- The four-step titration calculation: n = cV → mole ratio → n(unknown) → c(unknown)
3. Key Terms
4. Activity: Build the Lesson Map
Use the lesson to complete the table. Keep answers brief but specific.
| Prompt | Your answer |
|---|---|
| Main concept | |
| Important example | |
| Common mistake to avoid | |
| How this links to the next lesson |
5. Short Answer Questions
1. Explain this lesson goal in your own words: "A standard solution has accurately known concentration". Use one specific example from the lesson.
2. Apply this idea to a new example: "Primary standards must be: pure, stable, non-hygroscopic, soluble, high molar mass". Show your reasoning clearly.
3. Analyse why this idea matters for understanding Titration — Standard Solutions, Technique & Calculations: "The four-step titration calculation: n = cV → mole ratio → n(unknown) → c(unknown)".
6. Extend: Apply the Idea
A student gives a memorised answer about Titration — Standard Solutions, Technique & Calculations but does not use evidence or reasoning.
Improve the answer by writing a stronger response that uses accurate terminology, a relevant example and a clear explanation.
7. Multiple Choice
1. What is the best first step when answering a question about Titration — Standard Solutions, Technique & Calculations?
A. Identify the key concept being tested
B. Write every fact from memory
C. Ignore the command word
D. Skip examples and evidence
2. Which answer would show stronger understanding of Titration — Standard Solutions, Technique & Calculations?
A. An answer with accurate terms and reasoning
B. A copied definition only
C. A single-word response
D. An answer with no example
3. What should you do if a question asks you to explain?
A. Link the idea to a reason or cause
B. List unrelated facts
C. Only draw a diagram
D. Write the shortest possible answer
8. Success Criteria Proof
Finish with evidence that you can do each success criterion.