Oxidation States
Voltaic Cells
Redox Reactions
Cell Potential
Misc

100

The oxidation number of any metal in its elemental state.

What is 0.

100

Oxidation takes place at the ______ and reduction takes place at the ______ .

What is the anode, cathode.

100

The difference between oxidation and reduction.

What is oxidation is loss of electrons and reduction is gain of electrons

100

An electrochemical cell that generates electrical energy is called...

Galvanic or Voltaic cell

100

The ox and cat in electrochemistry help you remember.

What is anode and cathode.

200

The oxidation number of this type of ion is the same as its charge.

What is a monotomic ion.

200

The device used to maintain electrical neutrality.

What is the salt bridge.

200

The oxidizing agent in this reaction. Zn(s) + 2H+(aq) --> Zn+2(aq) + H2(g)

What is 2H+.

200

An electrochemical cell that requires energy is called...

electrolytic cell

200

When determining anode and cathode, you make the most positive reduction potential the ____________

what is the cathode

300

The oxidation number for Magnesium in MgF2.

What is +2.

300

The electrons in a galvanic cell with zinc and copper flow towards the ______ metal electrode . 

What is towards the copper electrode.

300

During redox reactions, oxidizing agents _________ in oxidation number

decrease

300

Find the standard cell potential for an electrochemical cell with the following cell reaction. Zn(s) + Cu2+(aq) Zn2+(aq) + Cu(s)

 Eoreduction of Cu2+ = + 0.339 V

 Eoreduction of Zn2+ = - 0.762 V

What is Eocell = + 1.101 V

 Zn(s) Zn2+(aq) + 2 e- Cu2+(aq) + 2 e- Cu(s) Eooxidation of Zn = - ( - 0.762 V) = + 0.762 V

300

What are the oxidation numbers for each element in SO42-?

S= 6+ and O=2-

400

The oxidation number for each element in PO4-3

What is -2 for oxygen and +5 for phosphorus.

400

What happens to the mass of the metal cathode in a galvanic cell?

increases

400

Na --> Na+ + e-

The reaction above is an example of...

An oxidation half reaction

400

 the positive ions flow from anode to cathode in order to...

balance the buildup of charge (offset the negative electrons)

400

Ca + Cl2 --> CaCl2

Identify the oxidizing agent and state why

chlorine because its oxidation number decreases/is reduced

500

The oxidation number zinc in this reaction changes from. Zn + I2 --> ZnI2

What is 0 to +2.

500

Using a galvanic cell containing Zinc and Copper, write the cell notation. Zn+2 + 2e- --> Zn(s) = -0.76 Volts Cu+2 + 2e- --> Cu(s) = 0.34 Volts

What is Zn(s) | Zn2+(aq) || Cu2+(aq) | Cu(s)

500

Which reaction is NOT a redox reaction

1. 2H2 + O2 → 2H2

2. Zn + CuSO4 → ZnSO4 + Cu 

3. 2H2O2 → 2H2O + O2 

4. H2O + CO2 → H2CO3

Question 4


500

Calculate the Ecell and write the overall reaction for:

Ag++e--->Ag  Eo = 0.80V

Zn2+ + 2e- --> Zn Eo = -0.76 V

What is Eocell = + 1.56 V

500

Create a galvanic cell using copper II nitrate, Silver nitrate, copper metal, silver metal, potassium nitrate.

Label all the parts and directions of each ion and electron flow