Discussion
Consider the following statements about soap manufacture.
1. Glycerine is recovered from the spent lye as a valuable by-product.
2. Graining out with salt separates the soap from the lye.
3. Sodium soaps are softer than potassium soaps.
Answer: B
The first two are correct. The third is the wrong way round, since potassium soaps are the soft ones used in liquid and shaving products while sodium soaps make hard bars. The choice of alkali decides the product form.
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