How are soaps different from detergents?
Quick Answer
Soap is made from fats or oils reacting with a strong base, while detergents are usually synthetic cleaning agents. Both work because they have one end that likes water and one end that likes oil.
The Full Story
Soap is typically produced by saponification, where natural fats or oils react with sodium hydroxide or potassium hydroxide. Detergents are often synthetic molecules designed to clean in harder water and different conditions. Both types are surfactants, meaning they can surround grease and help it mix with water so it can be rinsed away. Soap can form scum in hard water because of calcium and magnesium ions, but many detergents are made to avoid that problem. The chemistry of cleaning became especially important in the 20th century as synthetic detergents spread widely.
Key Facts
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"Why soap works on grease but water alone doesn’t"
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