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Identifying dipolar ions

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There is a question in my textbook that reads P-amino acid is not a dipolar ion, whereas glycine (aminoacetic acid) is not a dipolar ion- how do you account for this? I understand that there may be some ring stability involved with the amino bezoic acid but I know that if aqueous acid is added than they will both be converted to a dipolar ion or will they? Need help with distiguishing.

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All amino acids are characterised by two important functional groups:the amino group(NH2) and carboxyllic group (COOH). They exhibit a very important phenomenon of dipolarity or ...

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The solution shows how to identify dipolar ions.

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Covalent and Ionic Bonding

Research the answers to the following questions on the internet and write your answers in your own words. For each answer, include the address of the web site (or title and author of a book or article) that you used to help you answer the question.

1. Which type of compound usually has higher melting points: ionic compounds or covalent compounds? What is the reason for this difference in melting points? (3 points)

2. Do ionic compounds conduct electricity as: (3 points)
1. Solids?
2. Liquids?
3. Aqueous solutions (when the ionic compounds are dissolved in water)?

3. Do covalent compounds conduct electricity as: (3 points)
1. Solids?
2. Liquids?
3. Aqueous solutions (when the covalent compounds are dissolved in water)?

4. Explain the differences between ionic and covalent bonding that account for the differences in their melting points.

5. In order to conduct an electrical current, a substance must have charged particle s (ions or electrons) that are free-moving (able to move about throughout the sample).

6. Why do you think ionic compounds are not able to conduct electricity as solids, even though they can as liquids and in solution?

7. why do you think pure (distilled) water does not conduct electricity but tap water usually does?

Part II

Molecular Model for your models of H2O, NH3, CH4, and CO2.
1. Use the information from the lesson to determine the answers to the questions below.
For each of your molecules, answer the following questions:
1. Determine the electronegativity between the atoms of each molecule.
2. Identify the bond as either ionic or covalent.
3. State whether the molecule is polar or non polar.
4. Identify the structure as having hydrogen bonding, dipole-dipole moments or London dispersion forces (LDF).

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