MCQ
Sodium chloride is used in soap industry for soap's $.......$
- ADecomposition
- BRemoval of hardness
- ✓Precipitation
- DNone of the above
✓
Answer
Correct option: C.
Precipitation
The addition of salt $($sodium chloride$)$ to the crude form of soap forms fatty $-$ acid salts. The sodium ions from the sodium chloride bond with the fatty acid, forming a product that is less soluble in water.
Because of this reduced solubility, the soap leaves the solution and forms a solid mass. This process of "dropping" out of the solution is called precipitation.
Because of this reduced solubility, the soap leaves the solution and forms a solid mass. This process of "dropping" out of the solution is called precipitation.
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