exam 2

Question 1

dilution

Answer 1

M1V1=M2V2

Question 2

temperature/solubility relationship

Answer 2

inverse

Question 3

Henry’s Law

Answer 3

C (concentration of dissolved gas) = k (constant) x P (partial pressure of a gas)

Question 4

Boyle’s Law

Answer 4

V = (1/P)k

Question 5

Charles’ Law

Answer 5

V=k(constant) x T (Kelvin)

Question 6

Avogadro’s law

Answer 6

V = k x n(moles)

Question 7

ideal gas law

Answer 7

PV=nRT
- no interactions between gas atoms
- gas atoms have 0volume

Question 8

R (ideal gas law questions)

Answer 8

0.08206 Latm/molK

Question 9

STP

Answer 9

273.15 K, 1 atm = 760 torr

Question 10

gas volume at STP

Answer 10

22.4 L/mole

Question 11

molar mass (using ideal gas law)

Answer 11

PV = mRT/MM

Question 12

dalton’s law of partial pressures

Answer 12

P (total) = P1 + P2 + P3 +…

Question 13

arrhenius acids and bases definition

Answer 13

• too limiting
  acid = H+ donor
  base = OH-

Question 14

bronsted-lowry acids and bases definition

Answer 14

acid = proton donor
base = proton acceptor

Question 15

oxidation

Answer 15

loss of electrons

Question 16

reduction

Answer 16

gaining electrons

Question 17

oxidizing agent

Answer 17

does the oxidizing so it gets reduced (gains electrons)

Question 18

reducing agent

Answer 18

does the reducing so it gets oxidized (loses electrons)

Question 19

molarity

Answer 19

moles/liters

Question 20

molality

Answer 20

moles/kg of solvent

Question 21

mole fraction

Answer 21

mole A/total moles

Question 22

average kinetic energy of one mole of gas

Answer 22

E =3/2RT
R = 8.31J/kmol
J= kg x m^2/s^2

Question 23

velocity proportion of average kinetic energy of one mole of gas

Answer 23

E = 1/2MMu^2

Question 24

root mean square velocity

Answer 24

u (rms) = sqrt (3RT/2MM)

Question 25

graham’s law of effusion

Answer 25

rate of effusion of g1/rate of effusion of g2 = sqrt(MM2)/sqrt(MM1)

Question 26

kinetic molecular theory

Answer 26

1. particles volume is negligible (=0)
2. particles are in constant motion
3. particles neither repel nor attract each other
4. average kinetic energy of gas particles is assumed to be directly proportional to temperature (K) of gas

Question 27

work

Answer 27

w = f x d
w -P(delta)V

Question 28

change in internal energy

Answer 28

deltaE = q + w

Question 29

calorimetry

Answer 29

q = mCdeltaT
m=mass
cdelta= specific heat capacity
T=temperature

deltaE=mCdeltaT

Question 30

real gases are ideal when

Answer 30

have high temperature and low pressure