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How does common salt help in separating soap from the solution after saponification?

  • A.By decreasing density of soap
  • B.By decreasing solubility of soap
  • C.By increasing density of soap
  • D.By increasing solubility of soap

Answer: B

Common salt separates soap from the solution after saponification by decreasing the soap's solubility - a process called salting out.

The sodium ions from the salt raise the concentration of sodium in the water, and the soap, being a sodium salt, is forced out of solution and floats to the top as a curd.

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