Yes Important

Question 1

pH range of Methyl Orange:

Color:

Answer 1

pH range: 3.1-4.4

Color Below pH: Red

Color Above pH: Yellow

Question 2

pH range of Bromthymol Blue:

Color:

Answer 2

pH range: 6.0-7.6

Color Below pH: Yellow

Color Above pH: Blue

Question 3

pH range of Litmus:

Color:

Answer 3

pH range: 4.5-8.3

Color Below pH: Red

Color Above pH: Blue

Question 4

pH range of Phenolphthalein:

Color:

Answer 4

pH range: 8.3-10.0

Color Below pH: Colorless

Color Above pH: Red/Pink

Question 5

Importance of using specific indicators?

Answer 5

The salt formed through titration will be best observed using the most suitable indicator

• The hydrolysis of the salt may cause the solution to be slightly acidic, slightly basic or neutral
  
  • The titration of a strong acid and strong base can be tested through any indicator as its resulting salt will produce neutral solution. The addition of a strong base and a strong acid will cause a large enough pH change for the indicator to change color
  • The titration of a strong acid and weak base should be tested using an indicator within the acidic range
  • The titration of a strong base and weak acid should be tested using an indicator within the basic range

Question 6

Heat capacity of liquid water:

Heat capacity of steam:

Heat capicty of Ice:

Answer 6

liquid water: 4.18J/g C

steam: 1.84 J/g C
ice: 2.09 J/g C

Question 7

Water

Heat of fusion:

Heat of Vaporization:

Answer 7

Heat of fusion: 6.02 kJ/mol

Heat of vaporization: 40.67 kJ/mol

Question 8

k_f of water:

k_b of water:

Answer 8

k_f: 1.86/molal

k_b: .572/molal

Question 9

Electron coulomb conversion factor

Answer 9

1 electron= 1.6 x 10^-19 coulombs

Question 10

vapor pressure of aqueous solution:

Answer 10

mole fraction of water x normal vapor pressure of water

Question 11

Gibbs Free Energy:

Answer 11

ΔG= ΔH - TΔS

T as in terms of Kelvin

Question 12

Under what conditions is a reaction spontaneous?

Answer 12

• ΔH and +TΔS= Always spontaneous
• ΔH and -TΔS= Spontaneous at low T nonspontaneous at high T

+ΔH and +TΔS = Spontaneous at high T nonspontaneous at lwo T

+ΔH and -TΔS= never spontaneous

Question 13

What is a volumetric flask used for?

Answer 13

Used for preparation of solutions of specific concentrations when a solid is used as the solute

Question 14

Significant constituent of baking powder:

Answer 14

NaHCO₃

Question 15

Properties of Hydrogen:

Answer 15

Highly flammable gas

Diffuses more rapidly than any other gas

Does not dissolve in water

Question 16

Alkali metal + water=

Alkali metal + acid

Answer 16

::Metal hydroxide + hydrogen gas

:: Hydrogen is displaced, releasing hydrogen gas and forming a salt

Question 17

Composition of atmoshpere:

Answer 17

78% Nitrogen;

20% Oxygen;

1% water vapor;

.97% argon;

Question 18

1 calories=

Answer 18

4.184 Joules

Question 19

Metal oxide + nonmetal oxide yields

Answer 19

Salt

Question 20

Metal Carbonate + heat yields

Answer 20

Metal oxide + Carbondioxide

Question 21

Metal Chlorate + heat

Answer 21

Metal oxide + water

Question 22

Metal suflite + heat

Answer 22

Metal oxide + water + carbon dioxide

Question 23

Acid + Carbonate

Answer 23

H+ displaces metal forming its ion + water + Carbon dioxide

Question 24

Green house gases:

Answer 24

CO₂, N₂O, CH₄, ChlorofluoroCarbons

Question 25

Greenhouse gases absorb what?

Answer 25

Infared radiation reflected from earth

Question 26

SO₂reacts with with ___ to form SO₃

Answer 26

Ozone or diatomic molecules

Question 27

SO₃ reacts with water to form what?

Answer 27

Sulfuric acid

Question 28

Formula for limestone

Answer 28

CaCO₃ limestone is also marble

Question 29

CaCO₃ reacts with sulfuric acid

Answer 29

CaSO₄ + H₂CO₃

H₂CO₃ decomposes to CO₂ + H₂O

Question 30

formula for lime:

Answer 30

Ca(OH)₂

Question 31

Lime + water

Answer 31

exothermic reaction of Ca(OH)₂

Question 32

CO₂ + Slaked lime (calcium hydroxide)

Answer 32

CaCO₃ + H₂O

CaCO₃ does not react with water