gen chem 2 test 3

Question 1

Titrant

Answer 1

known conc

Question 2

analyte

Answer 2

unknown conc

Question 3

Equivalence point

Answer 3

moles of titrant=moles of analyte

Question 4

End point

Answer 4

when indicator changes color, right after the equivalence point but IS NOT the same thing, instead we used it as an approximation for equivalence point and count this as a systematic error in every titration

Question 5

equivalence point location in titration curve

Answer 5

halfway between the vertical jump portion

Question 6

pH for strong acid base titration

Answer 6

7

Question 7

midpoint (weak acid/strong base)

Answer 7

half equivalence point pH=pKa, halfway between buffering region

Question 8

solubility

Answer 8

how much salt can dissolve in a given amount of solvent at a given temperature in g/ml, g/100ml, g/L, M(mol/L)

Question 9

addition of a common ion……

Answer 9

increase products, make reactants = solid more insoluble

Question 10

addition of H3O+ will…..

Answer 10

increase the solubility of a salt that contain anion of weak acid because Its going to react away products, so more solid will be dissolved to establish equilibrium

Question 11

Complex ion

Answer 11

central metal ion covalently bonded to 2 or more molecules called ligands

Question 12

Qsp=Ksp

Answer 12

saturated soln

Question 13

Qsp>Ksp

Answer 13

ppt

Question 14

Qsp<Ksp

Answer 14

no ppt

Question 15

K>1 favors …

Answer 15

products

Question 16

K<1 favors …

Answer 16

reactants

Question 17

extensive

Answer 17

favors products

Question 18

non extensive

Answer 18

favors reactants

Question 19

oxidation

Answer 19

is loss of e- - oxidation number goes up- electrons are a product- anode

Question 20

reduction

Answer 20

is gain of e- - oxidation number goes down- electrons are a reactant- cathode

Question 21

oxidizing agent

Answer 21

gets reduced

Question 22

reducing agent

Answer 22

gets oxidized

Question 23

redox in acid steps

Answer 23

1. Separate into ½ reactions
2. Balance
   a. balance normal elements
   b. Add H2O to balance oxygens
   c. Add H+ to balance waters
   d. Last balance charges
3. Add half reactions and cancel like species

Question 24

Voltaic cell or galvanic cell

Answer 24

uses a spontaneous redox rxn to generate electrical energy (battery)

Question 25

Electrolytic cell-

Answer 25

uses electrical energy to drive nonspontaneous rxn (recharge)

Question 26

voltage

Answer 26

1V=1 J/C

The difference in electrical potential energy between anode and cathode

Question 27

cations move to

Answer 27

cathode

Question 28

anions move to

Answer 28

anode

Question 29

anode will…

Answer 29

deteriorate

Question 30

cathode will…

Answer 30

increase in mass

Question 31

Standard hydrogen electrode

Answer 31

SHE- E*=0 all half cell reactions are measured relative to SHE

Question 32

E* cell=

Answer 32

Ecathode – Eanode

Question 33

writing a voltaic cell in words

Answer 33

Electrode | electrolyte || electrolyte | electrode