1. Unit 6: Acid-Base Applications Lesson 3: Standards and Titration Curves

2. Standard Solutions
Titrations require a solution with accurately known concentration – called a standard solution.
Ways to make a standard solution:
Dilute a measured amount of a pure, stable (unreactive with chemicals in the air) substance to a precise volume. This is called a primary standard.
Titrate a solution with a primary standard to accurately determine its concentration.
10 min

3. Common Primary Standards
The following are most commonly used to prepare primary standards:
Potassium hydrogen phthalate
(acid)
b) Oxalic acid dihydrate (acid)
c) Sodium carbonate (base)

4. Brain Break! Find as many words as you can using the letters shown, always using the middle letter. What’s the 9-letter word?
publisher

5. Plotting a Titration Curve
Complete #124 on pg. 167
15 min

6. Titration Curve for a Strong Acid and Strong Base
The pH rises almost vertically near the equivalence point.
Since a strong acid and a strong base undergo neutralization, the equivalence point is neutral.
Thus, an indicator with a transition point near pH=7 is needed.
10 min

7. Homework
Pg. 165 #121 and 122