Lecture 25: Applying IMF

Question 1

? intermolecular forces dissolve easier in water

Answer 1

weaker

Question 2

which salt is going to be more hydrated in an aqueous solution

Answer 2

the smaller ion with larger charge

Question 3

Cohesive forces stronger than adhesive forces

Answer 3

reduced height of the liquid

Question 4

adhesive forces stronger than cohesive forces

Answer 4

increased height of the liquid

Question 5

? atom = higher IM forces

Answer 5

bigger

Question 6

does # of H bonds matter

Answer 6

yes, more bonds = stronger

Question 7

Solute

Answer 7

component present in smaller # of moles (salt)

Question 8

Solvent

Answer 8

component present in larger # of moles (Water)

Question 9

Solvation

Answer 9

solvent pulls solute particles apart and surrounds or solvates them

Question 10

steps of solvation

Answer 10

-break solute-solute interactions
-break solvent-solvent interactions
-form solvent-solute interactions

Question 11

Solubility

Answer 11

max quantity of a substance that can dissolve in a given volume of solution

Question 12

solubility is dependent on

Answer 12

strength of solvent-solute interactions over solvent-solvent and solute-solute

Question 13

Miscible

Answer 13

soluble infinitely

Question 14

Immiscible

Answer 14

not soluble at all

Question 15

Hyrophilic is

Answer 15

polar

Question 16

hydrophobic is

Answer 16

nonpolar

Question 17

if there are ? carbons, non-polar wins for dissolving

Answer 17

6

Question 18

surface tension

Answer 18

energy needed to separate molecules at the surface of a liquid

Question 19

Adhesion

Answer 19

interactions between unlike particles (against wall)

Question 20

Cohesive

Answer 20

interactions between like particles (away from wall)

Question 21

meniscus

Answer 21

curve at the surface of a liquid

Question 22

Capillary Action

Answer 22

when liquid flows up a narrow tube against the force of gravity (uses adhesion and cohesion)

Question 23

Viscosity

Answer 23

resistance to flow

Question 24

Volatility

Answer 24

tendency of a substance to vaporize (into gas)

Question 25

Vapor pressure

Answer 25

pressure exerted by the vapor over the liquid in a closed container when in dynamic equilibrium