Glycine dissolved in pure water whether will have a protonated C O O H group and an unprotonated N H 2 group has to be determined. Concept Introduction: Dissociation constant of acid: An acid dissociation constant ( K a ) is a quantitative measure of the strength of an acid in solution. Dissociation constant of base: A base dissociation constant ( K b ) is a quantitative measure of the strength of a base in solution. Zwitterion: This term is used mostly in case of amino acids. Zwitterion is a molecule with two or more functional groups , of which at least one has a positive and one has a negative electrical charge and the net charge of the entire molecule is zero.
Glycine dissolved in pure water whether will have a protonated C O O H group and an unprotonated N H 2 group has to be determined. Concept Introduction: Dissociation constant of acid: An acid dissociation constant ( K a ) is a quantitative measure of the strength of an acid in solution. Dissociation constant of base: A base dissociation constant ( K b ) is a quantitative measure of the strength of a base in solution. Zwitterion: This term is used mostly in case of amino acids. Zwitterion is a molecule with two or more functional groups , of which at least one has a positive and one has a negative electrical charge and the net charge of the entire molecule is zero.
Definition Definition Group of atoms that shape the chemical characteristics of a molecule. The behavior of a functional group is uniform in undergoing comparable chemical reactions, regardless of the other constituents of the molecule. Functional groups aid in the classification and anticipation of reactivity of organic molecules.
Chapter 19, Problem 19.120P
(a)
Interpretation Introduction
Interpretation:
Glycine dissolved in pure water whether will have a protonated COOH group and an unprotonated NH2 group has to be determined.
Concept Introduction:
Dissociation constant of acid:
An acid dissociation constant (Ka) is a quantitative measure of the strength of an acid in solution.
Dissociation constant of base:
A base dissociation constant (Kb) is a quantitative measure of the strength of a base in solution.
Zwitterion:
This term is used mostly in case of amino acids. Zwitterion is a molecule with two or more functional groups, of which at least one has a positive and one has a negative electrical charge and the net charge of the entire molecule is zero.
(b)
Interpretation Introduction
Interpretation:
[+NH3CH2COO−]/[+NH3CH2COOH] ratio has to be determined at pH 5.5.
Concept Introduction:
Henderson-Hasselbalch Equation:
The Henderson-Hasselbalch Equation can be written for any conjugate acid–base pair as given bellow,
pH=pKa+log([Base][Acid])
Where,
pH=-log[H3O+]pKa=-logKaKa=Dissociation constantofacid[Base]=Concentration of base[Acid]=Concentration of acid
(c)
Interpretation Introduction
Interpretation:
Structure of lysine at pH1, physiological pH(∼7) and pH13 has to be determined.
Concept Introduction:
Acidic pH means H+ ions are available. In other words, the concentration of H+ ion is more. So the base present in the system will be protonated.
Basic pH means the concentration of H+ ion is less, the concentration of OH− ion is more. So the acid present in the system will be deprotonated.
Physiological pH(∼7) means neutral. The concentration of H+ ion and OH− ion are same. At such condition zwitterion will be formed.
Zwitterion:
This word is used mostly in case of amino acids. Zwitterion is a molecule with two or more functional groups, of which at least one has a positive and one has a negative electrical charge and the net charge of the entire molecule is zero.
(d)
Interpretation Introduction
Interpretation:
The structure of glutamic acid at pH 1, physiological pH(∼7) and pH13 has to be identified from the given options.
Concept Introduction:
Acidic pH means H+ ions are available. In other words, the concentration of H+ ion is more. So the base present in the system will be protonated.
Basic pH means the concentration of H+ ion is less, the concentration of OH− ion is more. So the acid present in the system will be deprotonated.
Physiological pH(∼7) means neutral. The concentration of H+ ion and OH− ion are same. At such condition zwitterion will be formed.
Zwitterion:
This term is used mostly in case of amino acids. Zwitterion is a molecule with two or more functional groups, of which at least one has a positive and one has a negative electrical charge and the net charge of the entire molecule is zero.
how to get limiting reactant and %
yield based off this data
Compound
Mass 6) Volume(mL
Ben zaphone-5008
ne
Acetic Acid
1. Sam L
2-propanot
8.00
Benzopin-
a col
030445
Benzopin
a Colone 0.06743
Results
Compound
Melting Point (°c)
Benzopin
acol
172°c - 175.8 °c
Benzoping
to lone
1797-180.9
Assign ALL signals for the proton and carbon NMR spectra on the following pages.