Graphite leads in electrolysis

In summary, graphite leads are preferred for electrolysis because they are more efficient in producing bubbles when connected to a battery and placed in water. This is due to the fact that carbon has a lower oxidation potential compared to copper, and its oxidation product (carbon dioxide) is a gas that does not interfere with the process. Additionally, carbon electrodes are more affordable than other options such as copper or platinum.
  • #1
ufarad
15
0
What is it about graphite leads that make them so much better for electrolysis than, say, copper leads? I tried it both ways, connecting leads to a battery and then sticking them in some water and with the graphite leads there was much more bubbling going on. So what is it about the graphite? Thanks.
 
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  • #2
CO2 (g) + 4 H+ (aq) + 4 e- --> C (s) + 2 H2O (l) has an E0 of +0.20 V,
making carbon somewhat easier to oxidize than copper (E0 = +0.34).

So carbon electrodes do deteriorate slowly. The benefit is that their oxidation product (carbon dioxide) is a gas,
so it doesn't interfere much. And that carbon is simply a lot cheaper than e.g. copper (and especially platinum).
 

1. What is graphite's role in electrolysis?

Graphite is used as an electrode in electrolysis, meaning it is the material through which electricity is passed. It acts as a conductor, facilitating the flow of electrons between the anode and cathode.

2. How is graphite leads in electrolysis different from other types of electrodes?

Graphite leads have a high melting point and are resistant to corrosion, making them ideal for use in electrolysis. They also have a low electrical resistance, allowing for efficient electron transfer during the process.

3. Can any type of graphite be used in electrolysis?

No, only high-quality, pure graphite should be used in electrolysis. Impurities in the graphite can affect the efficiency and accuracy of the process.

4. How does electrolysis using graphite leads work?

In electrolysis, an electric current is passed through a liquid solution, causing a chemical reaction to occur. The graphite leads act as the electrodes, and the electric current causes ions in the solution to move towards the electrodes, where they either gain or lose electrons, resulting in a chemical change.

5. What are the benefits of using graphite leads in electrolysis?

Graphite leads are a cost-effective option for electrolysis, as they are readily available and have a long lifespan. They also have a high melting point and are resistant to corrosion, making them a reliable choice for this process.

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