gen Chem page 6

Question 1

percent comp by mass

Answer 1

mass of solute/mass of solution x 100

Question 2

mole fraction X of A

Answer 2

= moles of A/total moles of all species

Question 3

Molarity

Answer 3

M= mol solute/ L of solution

Question 4

Molality

Answer 4

m= mol solute/Kg solvent

Question 5

dilution formula

Answer 5

M1V1= M1V2

Question 6

solubility product constant

Answer 6

ksp= [A^n+]^m [B^m-] ^n

Question 7

ion product

Answer 7

IP=[A^n+]^m [B^m-] ^n

like a Q to compare with ksp

Question 8

IP < Ksp

Answer 8

unsaturated solution

Question 9

IP= Ksp

Answer 9

saturated solution

Question 10

IP > Ksp

Answer 10

a precipitate will form if more is added

Question 11

raoults law (vapor pressure depression)

Answer 11

P of A= X of A x (Vapor pressure of solvent A in pure state)

Question 12

boiling point elevation

Answer 12

delta Tb= i kb m

or delta Tb= Kb (mol ions/kg solvent)

Question 13

freezing point depression

Answer 13

delta Tf= i Kf m

or delta Tb= Kf (mol ions/kg solvent)

Question 14

osmotic pressure

Answer 14

pi= iMRT or 
pi= (mol ions) RT

Question 15

colligative properties

Answer 15

depend on # particles, not on type

bp elevation, fp depression ,osmotic pressure, vapor pressure depression

Question 16

if vapor pressure decreases, what happens to BP

Answer 16

BP increases

Question 17

Room temp

Answer 17

about 300 K

Question 18

body temp

Answer 18

37 C or 310 K

Question 19

ppm

Answer 19

g solute/g solution x 10^6

Question 20

ppb

Answer 20

g solute/g solution x 10^9

Question 21

liquid evaporates when the

Answer 21

vp > atm pressure