Log in
Chemistry
1
answer
0
watching
542
views
13 Dec 2019

Which metal(s), if coated onto iron, would prevent the corrosion of iron? Cr, Mg or Cu?

Standard Electrode Potentials at 25 ∘C
Reduction Half-Reaction E∘(V)
Fe2+(aq)+2e− →Fe(s) -0.45
Mg2+(aq)+2e− →Mg (s) -2.37
Cr3+(aq)+3e− →Cr (s) -0.73
Cu2+(aq)+2e− →Cu(s) 0.34

Watch
1
answer
0
watching
542
views

For unlimited access to Homework Help, a Homework+ subscription is required.

Collen Von
Collen VonLv2
17 Dec 2019

Unlock all answers

Get 1 free homework help answer.
Already have an account? Log in
Share
discord banner image
Join us on Discord
Chemistry Study Group
Join now

Related textbook solutions

Basic Chemistry
5 Edition,
Timberlake
ISBN: 9780134138046
Principles of Chemistry Molecular Approach
4th Edition,
Tro
ISBN: 9780134112831
Chemistry: Structure and Properties
2nd Edition,
Tro
ISBN: 9780134293936
Principles of Chemistry Molecular Approach
3rd Edition, 2014
Tro
ISBN: 9780321971944
Chemistry: A Molecular Approach
3rd Edition,
Tro
ISBN: 9780321809247
Chemistry: A Molecular Approach
5th Edition,
Tro
ISBN: 9780134874371
Principles of Chemistry: A Molecular Approach
4th Edition,
Tro
ISBN: 9780134895741
Chemistry: The Central Science
14th Edition, 2017
Brown
ISBN: 9780134414232

Related questions

Calculate the equilibrium constant for each of the reactions at 25∘C.
Standard Electrode Potentials at 25 ∘C
Reduction Half-Reaction E∘(V)
Fe3+(aq)+3e− →Fe(s) -0.036
Pb2+(aq)+2e− →Pb(s) -0.13
Ni2+(aq)+2e− →Ni(s) -0.23
O2(g)+2H2O(l)+4e− →4OH−(aq) 0.40
Cl2(g)+2e− →2Cl− 1.36
I2(s)+2e− →2I− 0.54

Part A

2Fe3+(aq)+3Pb(s)→2Fe(s)+3Pb2+(aq)

Express your answer using two significant figures.
K =

Incorrect; Try Again; 4 attempts remaining

Part B

O2(g)+2H2O(l)+2Ni(s)→4OH−(aq)+2Ni2+(aq)

Express your answer using two significant figures.
K =

Part C

Cl2(g)+2I−(aq)→2Cl−(aq)+I2(s)

Express your answer using two significant figures.
K =

Compare table 1 (the standard reduction potentials) to the periodic trends (radius, Ionization energy, electron affinity, electronegativity). Do the potentials in the table agree with our periodic trends? Why/why not (use at least two examples in your argument)?

Table 1: Standard Reduction Potentials

Half-Reaction

E°, volts

Na+(aq) + e– → Na(s)

-2.71

Al3+(aq) + 3 e– → Al(s)

-1.66

Zn2+(aq) + 2 e– → Zn(s)

-0.76

Cr3+(aq) + 3 e– → Cr(s)

-0.74

Fe2+(aq) + 2 e– → Fe(s)

-0.41

PbSO4(s) + 2 e– → Pb(s) + SO42–(aq)

-0.36

Ni2+(aq) + 2 e– → Ni(s)

-0.23

Sn2+(aq) + 2 e– → Sn(s)

-0.14

Pb2+(aq) + 2 e– → Pb(s)

-0.13

2 H+(aq) + 2 e– → H2(g)

0

Sn4+(aq) + 2 e– → Sn2+(aq)

0.15

AgCl(s) + e– → Ag(s) + Cl–(aq)

0.22

Cu2+(aq) + 2 e– → Cu(s)

0.34

O2(g) + 2 H2O(l) + 4 e– → 4 OH–(aq)

0.4

H2SO3(aq) + 4 H+(aq) + 4 e– → S(s) + 3H2O(l)

0.45

Ag+(aq) + e– → Ag(s)

0.8

O2(g) + 4 H+(aq) + 4 e– → 2 H2O(l)

1.23

Weekly leaderboard

Home
Homework Help 3,900,000
Chemistry 830,000
Start filling in the gaps now
Log in