Brainscape's Knowledge GenomeTM

Browse over 1 million classes created by top students, professors, publishers, and experts.


See full index

CHEM > Redox and Electrochemistry > Flashcards

Redox and Electrochemistry Flashcards

You may prefer our related Brainscape-certified flashcards:
AP® Chemistry flashcards Periodic Table flashcards Chemistry 101 flashcards Organic Chemistry 101 flashcards
1
Q

REDOX reactions abbreviation

A

LEORA

GEROA

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
2
Q

in Oxidation reactions, where are the electrons?

in Reduction, where?

A

OHR: e- is in products side

RHR: e- is in reactants side

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
3
Q

9 general rules for oxidation number

A
  1. 0 charge for elements
  2. ion charge for monoatomic ion
  3. in a molecule, sum of O.N. values is 0
  4. in polyatomic ion, sum of O.N. values is ion charge
  5. Group 1 = +1
  6. Group 2 = +2
  7. Group 17 = -1 w metals
  8. Hydrogen
    + 1 w nonmetals
    -1 w metals
  9. Oxygen
    -2 most of the time
    -1 in peroxides
    -1/2 in superoxide
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
4
Q

Reducing Agent vs Oxidizing Agent

A

RA undergoes oxidation reaction

OA undergoes reduction reaction

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
5
Q

Clues to use in identifying the ff:

  • peroxides
  • superoxides
A

PEROXIDES
- O2 with another element except GROUP 1
- O2 with GROUP 1 subscript 2 (Li2O2 ; H2O2 ; Na2O2)

SUPEROXIDES
- O2 with GROUP 1 (NaO2 ; RbO2 ; KO2)

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
6
Q

Are coefficients included when agents are assigned?

A

No… only the main molecule/element

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
7
Q

What are 3 rules when balancing chemical reactions using CON method

A
  1. Bawal galawin si OA and RA after balancing the reactants side
  2. Adjust the rest of the reactions accordingly
  3. Check if coefficients are simplifiable
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
8
Q

2 types of redox reactions

A
  1. Disproportional
  2. Comproportional
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
9
Q

TYPES OF REDOX REACTIONS

a species (only 1) is simultaneously reduced and oxidized

A

Disproportional

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
10
Q

TYPES OF REDOX REACTIONS

2 reactants (w same element but diff ON) form a product with its ON a value between the reactants

A

Comproportional

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
11
Q

2 TYPES OF ELECTROCHEMICAL CELLS

  • produces… through…
  • spontaneous or non spontaneous
  • energy requiring or not
  • system or surroundings does work?
A

VOLTAIC (Galvanic Cell)
- produces electricity through chemical reaction
- spontaneous
- does not need energy
- system does work on surroundings

Electrolytic Cell
- produces chemical reaction through electricity
- non - spontaneous
- needs energy
- surroundings does work on system

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
12
Q

7 components of a voltaic cell

A

Anode (s)| Reducing Agent (aq) || Oxidizing Agent (aq) | Cathode (s)

|| - Salt bridge (neutralizes the 2 solutions)
… | …. Phase boundaries
, - Same phases

- Phase boundaries

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
13
Q

Anode vs Cathode

A

Anode - gives e-
Cathode - receives e-

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
14
Q

How to create the Net Cell Reaction from OHR and RHR

A

Cancel the e- and combine reactants & products

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
15
Q

Standard value for voltmeter

A

1.10 V

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
16
Q

In the STANDARD REDUCTION POTENTIAL TABLE, what does a more positive E° value signify?

A

Higher tendency to be reduced (gain e-)

17
Q

In voltaic cell, how to identify which is the RHR and OHR?

A

RHR: more positive E° value

OHR: less positive E° value

18
Q

Basis reaction of the standard reduction potential table

A

2H3O+ + 2e- -> H2 + 2H2O

at 0.00 V

19
Q

3 conditions of the STANDARD REDUCTION POTENTIAL TABLE

A
  1. all ionic species at 1 M
  2. all gases at 1 atm
  3. 25 °C
20
Q

What do you call the mock-up voltaic cell with Zn as ANODE and Cu as CATHODE?

A

The Daniell Cell

21
Q

If either cathode or anode does not have a solid metal, what is used as replacement?

A

An inert metal

Pt

22
Q

What do you call the difference between the potential of anode and cathode? (2)

A

Cell potential / Cell voltage

23
Q

Formula for cell potential (2)

A

E° cell = E° cathode - E° anode

E° cell = E° red + E° ox

24
Q

2 conventions of cell potential

A
  • reaction multiplied by a factor = remain unchanged
  • reverse reaction = opposite sign only
25
Q

is E° an extensive or intensive property

A

intensive

26
Q

What do you call the mock-up electrolytic cell with Na as CATHODE and Cl as ANODE

A

Downs Cell

27
Q

What does the DOWNS CELL produce (2)

A

Na metal
Cl2 gas

28
Q

In electrolytic, how do you identify the RHR and OHR?

A

RHR: less positive E° value

OHR: more positive E° value

29
Q

If the RHR and OHR reactions are reversed in an electrolytic cell, what values to use when computing for E° cell?

A

The original values before reversing (similar lang sa pagcalculate in voltaic cell)

30
Q

What does the Faraday’s Law state?

A

Amount of product formed by electric current = amount of electron supplied

31
Q

Equation of Faraday’s Law

A

Q = I t = n F

Q = charge (C)
I = current ( A or C/s)
t = time (s)
n = mole of e- transferred
F = 96 485 C / mol e-

32
Q

Dimensional Analysis Shortcut

A

mass <-> moles <-> moles of e- <-> charge <-> current

CHEM (27 decks)

Brainscape helps you reach your goals faster, through stronger study habits.
© 2024 Bold Learning Solutions. Terms and Conditions