What is hard soap
Chemistry
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Answer
Hard soap is a type of soap typically made by saponifying fats or oils with sodium hydroxide (lye). This process results in a solid, firm bar of soap.
It is commonly used for personal hygiene (e.g., bar soap for washing hands and body) and laundry. The sodium salts of fatty acids are less soluble in water than potassium salts, contributing to its solid form.
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