Lesson plan
Castner–Kellner process
The Castner–Kellner process is a method of electrolysis on an aqueous alkali chloride solution (usually sodium chloride solution) to produce the corresponding alkali hydroxide, invented by American Hamilton Castner and Austrian Carl Kellner in the 1890s. It is a type of chloralkali process, but in this role it is gradually being replaced by membrane electrolysis which has lower energy cost and fewer environmental concerns.
Article summary
The Castner–Kellner process is a method of electrolysis on an aqueous alkali chloride solution (usually sodium chloride solution) to produce the corresponding alkali hydroxide, invented by American Hamilton Castner and Austrian Carl Kellner in the 1890s. It is a type of chloralkali process, but in this role it is gradually being replaced by membrane electrolysis which has lower energy cost and fewer environmental concerns.
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Discussion questions
- Summarise the article in your own words. Which single claim would you verify first, and why?
- Which claim in this article is most likely to be revised as the sources update? How would you check its current status?
- If two sources disagreed about one of these facts, what would you need in order to trust one over the other?
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