vapor pressure chapter 11.4-11.7 colligative properties

Question 1

what do colligative properties depend on

Answer 1

the number of solute particles, not the identity of the solute

Question 2

what are they often used for

Answer 2

determining the molar pressure of a solute

Question 3

what solute results in a larger change of colligative properties

Answer 3

ones who‘s ions completely dissociate

Question 4

what are non electrolytes

Answer 4

do not dissociate in water

Question 5

what are electrolytes

Answer 5

dissolve in water

Question 6

what is the van hoff factor if not soluble (review solubility flashcards)

Answer 6

1

Question 7

what is the measure of volatility

Answer 7

the more volitile, higher the tendency to evaporate

Question 8

what happens when there is a non volatile (does not easily vaporise) solute

Answer 8

lowers vapour pressure of the solvent (solute particles block solvent from evaporating,

Question 9

what is an ideal solution? When does a solution not behave ideally?

Answer 9

solute-solute, solvent-solvent, solute-solvent interaction are similar

mixing volume change should be zero, mixing temp change should be 0, enthalpie difference should be close to 0

when both solute and solvent are volatile

Question 10

what are the possibilities for an ideal solution

Answer 10

positive deviation and negative deviation

Question 11

what causes a positive deviation

Answer 11

like attracts like, polar and polar, the vapor pressure is higher then expected, endothermique

Question 12

what causes a negative deviation

Answer 12

polar-non polar, vapor pressure lower then expected, exothermique