Electrochemistry, assignment help

Anonymous
timer Asked: Nov 24th, 2016
account_balance_wallet $15

Question Description

QUESTION 1

Oxidation-reduction reactions are reactions in which:

protons are transferred from one reactant to another

electrons are transferred within the same atom

electrons are transferred from one reactant to another

oxygen molecules must participate

3 points Save Answer

QUESTION 2

In a reaction, oxidation can occur independently of reduction.

TRUE

FALSE

2 points Save Answer

QUESTION 3

Preventing the rusting of iron is a major industry. Which of the following methods would NOT control the amount of iron corrosion?

keep the iron sample dry

coat the iron sample with a waterproof coating

place a sacrificial electrode in contact with the iron

bathe the iron in a weakly acidic solution

3 points Save Answer

QUESTION 4

The oxidation number of an atom of a free element is always 1.

TRUE

FALSE

2 points Save Answer

QUESTION 5

In their compounds, metals:

are assigned positive oxidation numbers

are assigned negative oxidation numbers

are assigned oxidation numbers of zero

can be assigned any oxidation number that balances the equation

3 points Save Answer

QUESTION 6

In the reaction, C + 2 S Imported Asset CS2, the substance that is the oxidizing agent is:

the C

the S

the CS2

both the C and the S

3 points Save Answer

QUESTION 7

In the reaction, 2 Al (s) + 3 Sn+2 (aq) Imported Asset 2 Al+3 (aq) + 3 Sn (s), the reducing agent is:

the Al

the Sn+2

the Al+3

the Sn

3 points Save Answer

QUESTION 8

How many electrons should be added to balance the following oxidation half-reaction, H2O2 Imported Asset 2 H+ + O2?

None

One

Two

Four

3 points Save Answer

QUESTION 9

When balancing the oxidation and reduction half-reactions for basic solutions, you should:

use H+ and OH− equally in order to balance the equation

use H+ only in order to balance the equation

use H+ and H2O, as needed to balance the equation

use OH− and H2O, as needed to balance the equation

3 points Save Answer

QUESTION 10

Electrochemical reactions are oxidation-reduction reactions that:

are capable of generating electric current

have unequal oxidation numbers on both sides of the equation

only generate the oxidation reaction

only generate the reduction reaction

3 points Save Answer

QUESTION 11

The voltaic cell produces electric current from a spontaneous chemical reaction, but electrolytic reactions are not spontaneous.

TRUE

FALSE

Tutor Answer

sarac
School: UC Berkeley

here it is...

flag Report DMCA
Review

Anonymous
Thanks, good work

Brown University





1271 Tutors

California Institute of Technology




2131 Tutors

Carnegie Mellon University




982 Tutors

Columbia University





1256 Tutors

Dartmouth University





2113 Tutors

Emory University





2279 Tutors

Harvard University





599 Tutors

Massachusetts Institute of Technology



2319 Tutors

New York University





1645 Tutors

Notre Dam University





1911 Tutors

Oklahoma University





2122 Tutors

Pennsylvania State University





932 Tutors

Princeton University





1211 Tutors

Stanford University





983 Tutors

University of California





1282 Tutors

Oxford University





123 Tutors

Yale University





2325 Tutors