Discussion
The hot lime-soda process is preferred to the cold because at high temperature the reactions are
Answer: B
Correct answer: faster and the precipitate settles more readily
At elevated temperature the reactions go to completion more quickly, the precipitates form larger and denser particles that settle rapidly, and dissolved gases are driven off. The result is a smaller plant for a given throughput and a softer product water. The heat is usually available as exhaust steam, which is what makes the process economic.
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