7. What types of noncovalent interactions can occur between the following sets o

Question

7. What types of noncovalent interactions can occur between the following sets of molecules. Just indicate one noncovalent interaction (most important) for each of the sets. a. Between NH4 and CH,CO2 (acetate anion) b. Between NH3 and water c. Between benzene and octane (no water present) d. Between benzene and octane (in water) 8. Indicate for the following transitions if they involve noncovalent bonding (intermolecular interactions) or covalent bonding (intramolecular interactions). a. Boiling ethanol where it goes from a liquid to a gas. b. Converting the linear form of glucose into the cyclic form. c. Taking solid glucose and dissolving it in water. d. Digesting a protein into a mixture of amino acids.

Explanation / Answer

7.

(a)

There exists an electrostatic attractive force between positively charged ammonium ion and negatively charged acetate ion.

(b)

There exists intermolecular hydrogen bond between ammonia molecules and water molecules.

(c)

There exists non polar interactions ( dispersed force of attractions) between benzene and octane.

(d) There exists stronger cohesive forces between benzene and octane than that of between benzene and water and octane and water.

8.

(a) Non covalent bonding ( Physical change)

(b) Covalent bonding

(c) Non covalent bonding ( physical change)

(d) Covalent bonding (Chemical change)

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