In the electrolysis of sodium chloride, what material is the anode typically made from?

In the electrolysis of sodium chloride, the anode is typically made from titanium because it possesses several advantageous properties that make it suitable for this application. Titanium is highly resistant to corrosion, especially in the presence of chlorine, which is produced at the anode during the electrolysis process. This resistance extends the lifespan of the anode and ensures efficient operation.

Moreover, titanium can withstand the high-energy environment created during electrolysis, as it does not readily react with the substances involved. Its electrical conductivity allows it to effectively conduct electricity, facilitating the electrochemical reactions that occur at the anode.

Other materials, such as iron, would corrode quickly in the presence of chlorine gas, leading to contamination and reduced efficiency. Plastic lacks the electrical conductivity required for anode materials, and while copper is conductive, it is also susceptible to corrosion and reacts with chlorine, rendering it unsuitable for use in this environment. Thus, titanium emerges as the best choice for an anode in the electrolysis of sodium chloride.