Gen Chem

Question 1

Colligative property

Answer 1

depends on number of solute particles in given volume of water

Question 2

FP depression of an aq solution is a ___ property. What does this mean?

Answer 2

colligative;

If there are more solute particles, then the FP is lower

Question 3

1/2 equivalence point

Answer 3

for weak acids
[Ha] = [A-]
[H3O+] = Ka
pH = pKA

Question 4

Catalysts can increase the rate of reaction without…

Answer 4

• incr number of collisions
• KE of reactants
• Keq of rxn

Question 5

Elemental sulfur

Answer 5

S or S8

Question 6

Combustion always involves which reactant?

Answer 6

O2

Question 7

CH3COO -

Answer 7

acetate

Question 8

NH4+

Answer 8

ammonium

Question 9

NH3

Answer 9

ammonia

Question 10

CO3 2-

Answer 10

carbonate

Question 11

ClO3 -

Answer 11

chlorate

Question 12

ClO2 -

Answer 12

chlorite

Question 13

CrO4 2-

Answer 13

Chromate

Question 14

CN -

Answer 14

cyanide

Question 15

Cr2O7 2-

Answer 15

Dichromate

Question 16

HCO3 -

Answer 16

bicarb

Question 17

HSO4 -

Answer 17

Bisulfate

Question 18

HS -

Answer 18

bisulfide

Question 19

HSO3 -

Answer 19

bisulfite

Question 20

ClO -

Answer 20

Hypochlorite

Question 21

NO3 -

Answer 21

Nitrate

Question 22

NO2 -

Answer 22

Nitrite

Question 23

ClO4 -

Answer 23

Perchlorate

Question 24

MnO4 -

Answer 24

Permanganate

Question 25

PO4 3-

Answer 25

Phosphate

Question 26

PO3 3-

Answer 26

Phosphite

Question 27

SO4 2-

Answer 27

sulfate

Question 28

SO3 2-

Answer 28

Sulfite

Question 29

HNO3

Answer 29

Nitric acid

Question 30

CH3COOH

Answer 30

acetic acid

Question 31

for spontaneous reactions, cell voltage is positive / negative?

Answer 31

positive (E_cell > 0 & G < 0)

Question 32

equilibrium & reaction quotient expressions do not include…

Answer 32

pure solids & liquids

Question 33

Which compounds when added to a saturated solution of KNO3 would cause crystals to precipitate? Why?

Answer 33

Compounds with common ion (K+ or NO3-).

-> common ion effect

Question 34

Avogadro’s number

Answer 34

6.02 x 10^23

Question 35

strength of base depends on…

Answer 35

Stronger base:

• less EN
• higher (-) charge

Question 36

Catalytic amount

Answer 36

compound is regenerated in a later reaction and can be reused over and over again

Question 37

Why are pure liquids omitted from Keq calculations?

Answer 37

because their concentrations remain essentially constant

Question 38

HH

Answer 38

pH = pKa + [conj base] / [weak acid]

Question 39

in electrochemical cells, what becomes a gas?

Answer 39

the reduced compound

Question 40

Higher / lower [solute] will have a higher BP?

Answer 40

Higher

Question 41

Ag tends to always be reduced / oxidized?

Answer 41

reduced

Question 42

Cu tends to always be reduced / oxidized?

Answer 42

oxidized

Question 43

Ksp

Answer 43

Solubility Product Constant

Pretty much Keq but used for solubility purposes

Question 44

Ksp changes if ___ is changed

Answer 44

Temperature, and nothing else.

Question 45

vapour ____ changes depending on the size of the container

Answer 45

rate of vaporization