The saturated solution of sodium chloride is added in the hot process of preparation of soap, because:
Correct answer: C. It decreases the solubility of soap in water
- A. It increases the hardness of soap
- B. It increases the solubility of soap in water
- C. It decreases the solubility of soap in water
- D. It decreases the surface tension of water
Explanation
The solubility of soap in water depends upon the non-ionic or carbohydrate part of soap, as the sodium chloride is added in the hot process of preparation of soap the ionic part of soap increases therefore solubility of soap in water decreases.
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