Discussion
Consider the following statements about hydrochloric acid manufacture.
1. Burning hydrogen in chlorine gives a very pure product.
2. It is also recovered as a by-product of organic chlorination.
3. It is made by electrolysis of brine directly.
Answer: D
The first two are correct and are the two main sources. The third is wrong, since electrolysis gives chlorine and hydrogen separately, which must then be combined to make the acid. By-product acid often carries organic impurities.
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