1. Topic-
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2. Content-
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| Introduction to buffers and buffering capacity |
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3. Goals: Aims/Outcomes-
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1.Introduce students to the concept of buffers and that they are
substances that resist changes in pH when acid or base is added.
2.Teach buffer calculations
3.Students observe buffering capacity in blood buffering lab |
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4. Objectives-
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1.Students understand the concept of buffers and buffering capacity
and appreciate the importance of the carbonic acid-bicarbonate buffer
in human blood.
2. Students are able to perform buffer calculations
3. Students appreciate the ability of bicarbonate ions to regulate
blood pH after the addition of acid.
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5. Materials and Aids-
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28 250 ml beakers
distilled water
0.1 M NaHCO3
5 erlenmeyer flasks of 1.0 M HCl
15 straws |
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6. Procedures/Methods-
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A. Introduction-
1.Review main points of previous day's lesson
2.Survey students' ideas about the importance of buffers
3.Relate buffers' importance back to human survival |
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B. Development-
1.Relate buffers concept to human blood and relate back to Le Chatalier's
principle
2.Teach Buffers Note
3.Demo Lab procedure and safety guidelines |
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C. Practice-
1.Students complete buffer example as a class during note
2.Students observe buffering capacity in lab
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D. Independent Practice-
1.Students complete post-lab questions for tomorrow
2.Students complete day 15 homework from their textbook to practice
Buffer calculations.
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E. Accommodations (Differentiated Instruction)-
1.Auditory/Visual = Note
2.Kinesthetic = blood buffering and Le Chatalier with dynamic equilibrium
hand movement. Hands-on buffer lab activity. |
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F. Checking for understanding-
Class questioning during lesson
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G. Closure-
1. Students return all materials and clean work stations
2. Summarize main points on Buffers
3.Remind students of what is due |
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7. Evaluation-
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1.Summative assessment on lab sheet
2.Lab questions on unit test |
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