(Prelim) Activity 1 Discussion (Post-Lab)

Question 1

Properties that depend on the number of solute particles in a solution.

Answer 1

Colligative Properties

Question 2

diffusion of solvent through a semipermeable membrane from the solution of lower solute concentration to the solution of higher
solute concentration.

Answer 2

Osmosis

Question 2

Colligative Properties

Answer 2

1. Osmotic Pressure
2. Vapor pressure lowering
3. Boiling point elevation
4. Freezing point depression

Question 3

Osmotic pressure formula

Answer 3

Π = 𝑀𝑅𝑇
or
Π = 𝑖𝑀𝑅𝑇

Question 3

pressure required to counter osmosis

Answer 3

Osmotic pressure

Question 4

i means

Answer 4

Van’t Hoff factor

Question 5

M means

Answer 5

molarity

Question 6

R means

Answer 6

0.08205 L∙atm/mol ∙K

Question 7

T means

Answer 7

temperature (in K)

Question 8

2 ions in i(Van’t Hoff factor)

Answer 8

1.8

Question 8

5 ions in i(Van’t Hoff factor)

Answer 8

4.2

Question 8

3 ions in i(Van’t Hoff factor)

Answer 8

2.6

Question 9

4 ions in i(Van’t Hoff factor)

Answer 9

3.4

Question 10

when the osmotic pressure of the solution is the same, or very nearly the same, as that of the cell contents.

Answer 10

Isotonic

Question 11

solutions of greater concentration than within the cell

Answer 11

Hypertonic

Question 12

solutions of lower concentrations than within the cell

Answer 12

Hypotonic

Question 13

same conc. of inside & outside

Answer 13

Isotonic

Question 13

> 0.9%

Answer 13

Hypertonic

Question 14

0.9% NaCl

Answer 14

Isotonic

Question 15

< 0.9%

Answer 15

Hypotonic

Question 16

the pressure exerted by a vapor that is in
thermodynamic equilibrium with the condensed phase (solid or liquid) at
a given temperature in a closed system.

Answer 16

Vapor pressure

Question 16

it is characteristically defined by Dalton’s
Law of Partial pressure and Raoult’s Law.

Answer 16

For vapor pressure of solution

Question 16

is the summation of the individual partial vapor pressures of the components (solute and solvent) or the product of the molar fraction and the original vapor pressure of the pure components.

Answer 16

total vapor pressure of the system

Question 16

always equal to 1

Answer 16

molar fraction

Question 17

it is the temperature by which the vapor pressure of liquid is in equilibrium to the external atmospheric pressure.

Answer 17

Boiling Point

Question 18

It is a phenomenon or change by which solution of substance tend to increase its boiling point by the addition or increase
in the amount or concentration of the solute.

Answer 18

Boiling Point elevation

Question 19

Boiling Point Elevation FORMULA:

Answer 19

∆𝑇𝑏 = 𝐾𝑏𝑚 or ∆𝑇𝑏 = 𝑖𝐾𝑏𝑚

Question 20

∆𝑇𝑏 means

Answer 20

Boiling Point Elevation

Question 20

𝐾𝑏 means

Answer 20

Ebullioscopic constant (ºC/m)

Question 21

i means

Answer 21

Van’t hoff factor

Question 22

m means

Answer 22

molality

Question 23

R means

Answer 23

Gas constant ( 1.987 cal/mol . Deg)

Question 24

Tb means

Answer 24

Boiling point of solvent in Kelvin

Question 25

MW

Answer 25

MW of solvent

Question 26

∆𝐻𝑣𝑎𝑝

Answer 26

Molar heat of vaporization

Question 27

it is the temperature by which the solid and liquid phases are in equilibrium under a pressure.

Answer 27

Freezing Point

Question 28

It is a phenomenon or change by which
solution of substance tend to decrease its freezing point by the addition or increase in the amount or concentration of the solute.

Answer 28

Freezing Point elevation

Question 28

Freezing Point Depression formula

Answer 28

∆𝑇𝑓 = 𝐾𝑓𝑚 or ∆𝑇𝑓 = 𝑖𝐾𝑓𝑚

Question 28

∆𝑇𝑓 means

Answer 28

Freezing point depression

Question 29

𝐾𝑓

Answer 29

cryoscopic constant (ºC/m)

Question 30

R means

Answer 30

Gas constant (1.987 cal/mol . Deg)

Question 30

∆𝐻𝑓 means

Answer 30

Molar heat of fusion