Chemistry: Please check answers

posted by .

12.
What balances charges that may build up as reduction and oxidation occur in a voltaic cell?

*the salt bridge
one of the half-cells
the electrolyte solutions
the moving electrons






13.
What is the electrode in the center of the most common dry cell made of?

copper
zinc
iron
*graphite






14.
How is a lead storage battery recharged?

*A direct current is applied to it.

A magnet is held close to it.

Alternating current is forced through it.

The pressure on it is increased.






15.
What happens in a hydrogen-oxygen fuel cell?

*Oxygen diffuses through the cathode.

Oxygen diffuses through the anode.

Hydrogen diffuses through the cathode.

Hydrogen and oxygen are mixed before entering the anode.






16.
What standard reduction electrode has a half-cell potential of 0.00 V?

oxygen
*hydrogen
lithium
fluorine






17.
Which of the following is the name of a process in which electrical energy causes a chemical reaction?

hydrolysis
*electrolysis
oxidation
electronation






18.
Which of the following is true about an electrolytic cell?

It changes electrical energy into chemical energy.

It is the type of cell used in electroplating.

It uses an electric current to make a nonspontaneous reaction go.

*all of the above






19.
Identify the products formed in the net reaction of the electrolysis of water.

liquid hydrogen and oxygen gas

liquid oxygen and hydrogen gas

*hydrogen gas and oxygen gas

aqueous hydrogen ion and hydroxyl ion






20.
What occurs in electroplating?

deposition of a salt layer on a metal

*deposition of a metal layer on a
material

decomposition of a metal layer

decomposition of a salt layer

Thank You.

  • will somebody please answer this. -

    nnvcxc

  • Chemistry: Please check answers -

    12. I was tempted to pick the salt bridge, too, however, the salt bridge only ALLOWS the balancing charges to pass through is the proper direction. It's the electrolytes that actually do the balancing. Think about that for awhile. The question is somewhat ambiguous.

    20. I agree with your answer; however, I should point out that in order for the metal to be deposited onto another surface, the metal must be "removed" from another place. Many might consider that a decomposition of the metal layer. Again somewhat ambiguous answer; I suspect your answer is the one desired.
    All of the other answers look ok to me.

Respond to this Question

First Name
School Subject
Your Answer

Similar Questions

  1. Chemistry again

    Two voltaic cells are to be joined so that one will run the other as an electrolytic cell. In the first cell, one half-cell has Au foil in 1.00M Au(NO3)3, and the other half-cell has a Cr bar in 1.00M Cr(NO3)3. In the second cell, …
  2. Chem -plz check work

    so i've worked on this some more, now I am asking if someone will plz check my work 2 half cells in a galvanic cell consist of one iron Fe(s) electorde in a solution of iron (II) sulphate FeSO4(aq)and a silver Ag(s) electrode in a …
  3. Science

    In a wet type of voltaic cell, what is the electrolyte?
  4. Chemistry

    a glavanic cell is set up by connecting the following half-cells together: nickle electrode in nickel nitrate solution and a copper electrode in copper nitrate solution. in which half-cell will oxidation occur?
  5. science

    in a wet type of voltaic cell, what is electrolyte?
  6. Chemistry

    Consider a chromium-silver voltaic cell that is constructed such that one half-cell consists of the chromium, Cr, electrode immersed in a Cr(NO3)3 solution, and the other half-cell consists of the silver, Ag, electrode immersed in …
  7. chem 2

    Consider a chromium-silver voltaic cell that is constructed such that one half-cell consists of the chromium, Cr, electrode immersed in a Cr(NO3)3 solution, and the other half-cell consists of the silver, Ag, electrode immersed in …
  8. chemistry

    1. what would happen to the the cell potential in a voltaic cell if the salt bridge lost contact with one of the solutions?
  9. Chemistry

    What assures that there is no charge build up in a voltaic cell as oxidation and reduction occur?
  10. Chemistiy

    Check if im right please. a. oxidation occurs at my anode ____ ** Voltaic Cell b. You can use standard reduction potential table to calculate how much voltage it takes to operate me____ **Both voltaic cell and electrolytic cell

More Similar Questions