Percentage of glycerine present in the spent lye obtained during soap manufacture is about________________?
Correct answer: B. 5
- A. 0.5
- B. 5
- C. 20
- D. 35
Explanation
Spent lye from soap manufacture contains dissolved glycerine along with alkali salts and other impurities, with glycerine commonly around 5%. The higher values are not typical of the untreated spent lye composition.
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