Electrochemistry, assignment help.
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
Electrochemistry, assignment help
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