Module 1

Question 1

electrostatic interactions that exist between molecules

Answer 1

intermolecular forces

Question 2

what various physical properties influence the intermolecular forces

Answer 2

melting point, boiling point and solubility

Question 3

type of intermolecular forces that is ionic

Answer 3

ion-dipole interactions

Question 4

type of intermolecular force that is hydrogen bonding and polar

Answer 4

dipole-dipole interactions

Question 5

type of intermolecular force that is non polar

Answer 5

dispersion force

Question 6

what makes molecules water soluble

Answer 6

OH group

Question 7

what element reacts violently and flammable with water

Answer 7

sodium metal

Question 8

is acetone soluble in water

Answer 8

yes

Question 9

is ethanol soluble in water

Answer 9

yes

Question 10

is toluene soluble in water

Answer 10

no

Question 11

is dichloromethane soluble in water

Answer 11

no

Question 12

is heptane soluble in water

Answer 12

no

Question 13

is methanol soluble in water

Answer 13

yes

Question 14

is isobutanol soluble in water

Answer 14

no

Question 15

is tert-butanol soluble

Answer 15

yes

Question 16

is 1-butanol soluble

Answer 16

no

Question 17

is 2-butanol soluble

Answer 17

yes

Question 18

what solubilized the salicylic acid and has generated bubbles

Answer 18

sodium bicarbonate

Question 19

what increased solubility of salicylic acid after addition of ammonium hydroxide

• acid-base equilibrium reaction

Answer 19

ammonium hydroxide (base)

Question 20

• does not change the insolubility of the salicylic acid
• salicylic acid remains insoluble

Answer 20

hydrochloric acid

Question 21

what technique used to characterize covalent bonds

Answer 21

infrared (IR) spectroscopy

Question 22

what measure which frequencies are absorbed

Answer 22

IR spectrophotometer

Question 23

what represent a decrease in transmitted light at that frequency

Answer 23

inverted peaks

Question 24

what depend on the identity and electronic environment of the bonds

Answer 24

absorbed frequencies

Question 25

A covalent bond between 2 atoms can be modeled as a spring connecting 2 bodies with masses m1 and m2

Answer 25

principle of IR spectroscopy

Question 26

what measures the light intensities for each interferometer setting

Answer 26

IR detector

Question 27

what do you call the data that has been collected over the desired frequency range, it is processed into a recognizable spectrum

Answer 27

fourier transform

Question 28

what do you call that blocks all but a few wavelengths of light at any given time onto the sample

Answer 28

interferometer