Galvanic Cell

What happens to the anode after some time?

• Electrode gets bigger

• Electrode gets smaller

• Electrode stays the same

• Electrode disappears

Where does metal ion goes to?

• It becomes part of the solution

• It becomes part of the metal

• It goes to the wire

• It goes to the salt bridge

Why does Zn gives up electron to Cu²⁺?

(Answers are more than 1)

• It has a strong pull for electrons

• It has a weaker pull for electrons

• It is a good reducing agent

• It is a good oxidizing agent

Tags

NGSS.HS-PS1-2

Why does Cu²⁺ take electron from Zn? (Answers are more than 1)

• It has a strong pull for electrons

• It has a weaker pull for electrons

• It is a good reducing agent

• It is a good oxidizing agent

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2

It is a short hand abbreviation of the voltaic reactions in a voltaic cell

WHICH IS ANODE?

• COPPER ELECTRODE

• ZINC ELECTRODE

• ZINC SULFATE SOLUTION

• SALT BRIDGE

Tags

NGSS.HS-PS1-2

What is a galvanic (voltaic) cell?

• It is a cell that destroys electrons on one side and creates electrons on the other side.

• It is a cell that contains only one metal bar and one aqueous ion solution.

• It is a type of battery that drives a redox reaction when electricity is applied.

• It is a type of battery that generates an electrical current from redox reactions.

Under standard conditions, a Ni-Cd galvanic cell generates a potential of +0.15V using the chemical reaction represented above. Which of the following best explains how [Ni2+]>1M affects the cell potential if this is the only change made to the operation of the galvanic cell?

• The ratio [Cd2+]/[Ni2+] is smaller if [Ni2+]>1M, resulting in Q<1

  Q<1 and Ecell>E°cell.

• The ratio [Cd2+]/[Ni2+] is smaller if [Ni2+]>1M resulting in Q>1

  and Ecell>E°cell.

• The ratio [Ni2+]/[Cd2+] is larger if [Ni2+]>1M, resulting in Q>1 and Ecell

• The ratio [Ni2+]/[Cd2+] is larger if [Ni2+]>1M, resulting in Q<1 and Ecell

Tags

NGSS.HS-PS1-5

A galvanic cell was constructed using a salt bridge containing KNO₃. A second cell is constructed from identical half-cells but uses NaNO₃ for the salt bridge. Which of the following best explains whether the initial potential of the second cell will be different from the initial potential of the first cell?

• The initial potential of the second cell will be lower than the initial potential of the first cell because Na has a lower molar mass than K has.

• The initial potential of the second cell will be higher than the initial potential of the first cell because Na is less electronegative than K is.

• The initial potential of the second cell will be the same as the first cell because the ions from the salt bridge are not oxidized or reduced during cell operation.

• The initial potential of the second cell will be higher than the initial potential of the first cell because Na is less electronegative than K is.

Given their standard reduction potentials, which of the species is going to be oxidized?

• Cu

• Zn

• CuSO4

• ZnSO4

Tags

NGSS.HS-PS1-2