Electrochemistry - Half Cell Reactions

In summary, the conversation discusses a Galvanic Cell and determining its anode and cathode half reactions, complete cell reaction, and if it is a concentration cell. The anode reaction is 2OH^- -> 2H^+ + O2 + 4e^- and the cathode reaction is O2 + 4e^- + 2H^+ -> 2OH^-. It is determined that the cell is a concentration cell with a standard cell potential of 0.
  • #1
AGNuke
Gold Member
455
9
A Galvanic Cell is given. Write its Anode and Cathode half reactions, complete cell reaction and thus determine if the given is concentration cell.

[itex]Pt|O_2(1\; atm)|NaO\! H(10^{-3}M)||H_2SO_4(0.5M)|O_2(1\;atm)|Pt[/itex]

I know that at anode, Oxygen will get oxidised, maybe from NaOH solution and at cathode, Oxygen will get reduced.

Here's what I think of anodic reaction
[itex]2O\!H^-\rightarrow 2H^++O_2+4e^-[/itex]

And the mighty cathodic reaction
[itex]O_2+4e^-+2H^+\rightarrow 2O\!H^-[/itex]

And thus, this cell is just a concentration cell (i.e. E°(cell) = 0)


Am... I right? :rolleyes:
 
Physics news on Phys.org
  • #2
Hello...? Can please anyone answer the question that I am right with my guesswork? This question is eating me inside out.
 

Related to Electrochemistry - Half Cell Reactions

1. What is electrochemistry?

Electrochemistry is a branch of chemistry that deals with the study of chemical reactions involving electricity. It involves the transfer of electrons between two substances, known as half-cell reactions, to produce electric current or to induce chemical changes.

2. What is a half-cell reaction?

A half-cell reaction is a chemical reaction that involves the transfer of electrons between two substances. It occurs at the interface of an electrode and an electrolyte solution, and it is an essential part of any electrochemical process.

3. What is an anode and a cathode in a half-cell reaction?

The anode is the electrode where oxidation occurs, and electrons are released. It has a negative charge and is represented by the symbol (-). The cathode is the electrode where reduction occurs, and electrons are gained. It has a positive charge and is represented by the symbol (+).

4. How is a half-cell reaction written?

A half-cell reaction is written in the form of a reduction-oxidation (redox) reaction, where the reactants and products are separated by a double vertical line. The reactants are written on the left side, and the products are written on the right side. The number of electrons transferred is also indicated in the reaction.

5. What is the significance of half-cell reactions in electrochemistry?

Half-cell reactions play a crucial role in electrochemistry as they help in understanding the flow of electrons and the production of electric current. They also provide information about the chemical substances involved in a reaction and their oxidation and reduction states. Half-cell reactions are essential for the design and functioning of electrochemical cells, batteries, and other devices that utilize electricity.

Similar threads

How do I calculate the cell potential?
    • Biology and Chemistry Homework Help
Replies
3
Views
2K
Clarification about the sign of EMF in batteries and electrochemistry
    • Chemistry
Replies
3
Views
2K
Find Cell Potential Given Mass
    • Biology and Chemistry Homework Help
Replies
10
Views
3K
Calculating ECell of Anode-Half Cell? Chemistry Review
    • Biology and Chemistry Homework Help
Replies
1
Views
5K
Electrochemical Cells (involving partial pressures and pH)
    • Biology and Chemistry Homework Help
Replies
7
Views
6K
Question about the Li -> Li+ + e- half cell reaction in a LiB battery
    • Chemistry
Replies
5
Views
6K
Understanding Electrochemistry: Anode and Cathode Reactions
    • Chemistry
Replies
4
Views
2K
How do I know where each component of a reaction goes within a galvanic cell?
    • Biology and Chemistry Homework Help
Replies
2
Views
2K
Standard reduction potential and half reactions
    • Biology and Chemistry Homework Help
Replies
2
Views
5K
Microbiological Fuel Cell: Negative Voltage
    • Materials and Chemical Engineering
Replies
4
Views
3K

Hot Threads

Recent Insights

Back
Top