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Amino Acids
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Slide 1:
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Chemistry
Secondary Education
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Slide 1 - Diapositive
How are you feeling today?
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Slide 2 - Sondage
What two functional groups are present in amino acid?
Slide 3 - Question ouverte
Learning Objective
describe, by drawing, the acid / base properties of amino acids and the formation of zwitterions, to include the isoelectric point
Slide 4 - Diapositive
Slide 5 - Diapositive
Amino acids
Slide 6 - Diapositive
Amino acids as
zwitterions
an internal transfer of a hydrogen ion from the -COOH group to the -NH
2
group makes a
zwitterion
Slide 7 - Diapositive
What charges are found in a zwitterion?
A
positive
B
negative
C
A and B
D
zero
Slide 8 - Quiz
Zwitterions are ions.
amino acids exist in even in the solid state
If you dissolve the amino acid in water, a simple solution also contains this ion.
a compound with
no overall electrical charge,
but which contains separate parts which are positively and negatively charged.
Slide 9 - Diapositive
What happens to the hydrogen ions if you increase the pH of a solution of an amino acid by adding hydroxide ions?
A
hydrogen ion is removed from -NH3+
B
hydrogen ion is added to the -NH3+ group
Slide 10 - Quiz
Do this!
Show the equation for this reaction.
Slide 11 - Diapositive
What does the -COO- part of the zwitterion do to the hydrogen ion if you decrease the pH by adding an acid to a solution of an amino acid?
A
The -COO- releases a hydrogen ion.
B
The -COO- picks up a hydrogen ion.
Slide 12 - Quiz
Do this!
Show the equation for this reaction.
Slide 13 - Diapositive
Activity 5
Work with your study partner.
Slide 14 - Diapositive
Rate your level of understanding of the lesson.
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Slide 15 - Sondage
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