Chemistry: Electro chemistry help PLEASE?

In summary: For every substance you can write oxidation half reaction, and reduction half reaction. If you do it right, you will see that the number of electrons is the same for both half reactions. In summary, the conversation discusses the redox reaction that occurs in photographic film when exposed to light. This reaction involves the transfer of electrons between silver bromide crystals and results in the appearance of dark patches of metallic silver on the film. In order to understand the reaction, it is important to identify the oxidation and reduction half reactions, as well as the reducing agent. This information can be helpful in determining the e* of the tiny cell on the photographic film. The reaction is considered electrochemical and involves both oxidation and reduction processes. However, it is not recommended
  • #1
ally.hady
13
0
Chemistry: Electro chemistry help! PLEASE?

Photographic film contains a thin layer of silver bromide (AgBr) Crystals. When the light hits the film. Electrons are transferred from the Br- to the Ag + ions. Dark patches of metallic silver appear on the film where the lens of the camera focused light on the film.

a) why is this considered a redox reaction?
b) write the oxidation half reaction.
C) what substance is the anode
d) write the reduction half reaction
e) what substance is the reducing agent
f) what would be the e* of the tiny cell on the photo graphic film
g)is this cell electrochemical or electro lytic

please help me final exam tomorrow and i don't understand this unit... just give me hints or if u can show me how i would do it... steps would help too thankyou in advance!
 
Chemistry news on Phys.org
  • #2


If you have final tomorrow it is already too late, besides, your post is against forum rules. But let's try to give you at least some basic information.

By definition, every reaction where charge is transferred between atoms and/or molecules, is called a redox reaction. To find out what is getting oxidized and is what getting reduced you can use OIL RIG - oxidation is lose, reduction is gain (of electrons). Reducing agent is the one that reduces something else (it means it gets oxidized in the process).
 

1. What is electrochemistry?

Electrochemistry is the branch of chemistry that deals with the study of the relationship between electricity and chemical reactions. It involves the use of electricity to initiate or drive chemical reactions, and the study of the chemical changes that occur during these reactions.

2. What is an electrochemical cell?

An electrochemical cell is a device that converts chemical energy into electrical energy, or vice versa. It consists of two electrodes (anode and cathode) and an electrolyte solution, which allows for the transfer of ions between the electrodes.

3. What is the difference between galvanic and electrolytic cells?

Galvanic cells (also known as voltaic cells) convert chemical energy into electrical energy, while electrolytic cells use electrical energy to drive a non-spontaneous chemical reaction. Galvanic cells have a positive and negative electrode, while electrolytic cells have a positive and negative terminal.

4. What is electrode potential?

Electrode potential is the tendency of an electrode to lose or gain electrons during a redox reaction. It is a measure of the reactivity of an electrode and is expressed in volts. The more positive the electrode potential, the greater the tendency for the electrode to be reduced (gain electrons).

5. How is the Nernst equation used in electrochemistry?

The Nernst equation is used to calculate the electrode potential of an electrochemical cell under non-standard conditions. It relates the electrode potential to the concentration of reactants and products in the cell, as well as the temperature. It is commonly used to calculate the equilibrium cell potential of an electrochemical reaction.

Similar threads

  • STEM Career Guidance
Replies
3
Views
5K
  • Biology and Chemistry Homework Help
Replies
8
Views
2K
Replies
1
Views
2K
Replies
4
Views
7K
  • Chemistry
Replies
1
Views
3K
  • Biology and Chemistry Homework Help
Replies
3
Views
2K
  • Chemistry
Replies
7
Views
2K
  • Biology and Chemistry Homework Help
Replies
6
Views
2K
  • Biology and Chemistry Homework Help
Replies
28
Views
5K
Back
Top