'Hard' soap vs. 'Soft' soap: Why do they work this way?
Basically, yes, by common terms, soft soap has $\ce{K+}$ and hard soap has $\ce{Na+}$. They are both alkali metals, but $\ce{K+}$ is below $\ce{Na+}$ on the periodic table so maybe we should consider periodicity trends. As you go down a table the atoms become more reactive, so $\ce{K+}$ is more likely to react with polar parts of water than ...
Reasons for solid or liquid soap - Chemistry Stack Exchange
2017年9月1日 · Hard soaps are stable. However, a soft soap made can be made over a wide range of compositions and viscosities reproducibly with potassium, and will be stable and will not separate on storage. A soft soap made from sodium has much less stability, or a smaller stability range, and thus is more limited in what can be manufactured easily.
Soap and rain water, why does it not rinse off?
The benefit of hard water during the rinse is that the molecules of soap are deactivated as the rinsing proceeds, and even before it is completely accomplished. So the rinse seems to be finished quicker. Strong mechanical action will do much the same as hard water in squirting the last of the soap molecules out of the skin.
Soap versus Shampoo - Chemistry Stack Exchange
2014年11月18日 · Soap, chemically speaking, is a surfactant composed of the salt of a fatty acid, typically lauric, palmitic or stearic acids. It's typically produced by adding a strong hydroxide base to liquefied plant or animal fat, which liberates the fatty acids from the triglyceride via hydrolyzation, where they then bind with the free cations from the ...
If we add surfactant in soft and hard water, which will require more ...
2020年7月14日 · This reaction happens if the surfactant is the usual and well-known soap, produced by the action of soda on vegetable oils. This soap is made of oleate or other derivates from fatty acids, and it has the disadvantage that it binds with calcium in hard water, and settle as soap-stone in washing machines. But this only happens with soap.
Reaction of soap with water - Chemistry Stack Exchange
2014年11月18日 · The simplest kinds of soap are just a fatty acid chain with something more ionic on the end - something like the ubiquitous sodium laureth sulphate: When it's in bar form, it behaves a bit like a solid block of plastic, because chemically speaking, those long chains of carbon are quite a lot like a common plastic such as polythene.
everyday chemistry - Are acids effective in removing soap scum ...
2022年10月2日 · As long as the correct product is used, they are pretty effective. The soap scum is composed of calcium or magnesium salts of fatty acids. The substance is insoluble in water. Salts of sodium are soluble in water. As you may be aware, soap scum is greasy, and low quality acid cleaners simply bead up and flow downwards when sprayed on walls.
What is the reason you could use synthetic detergent in hard …
2022年11月19日 · I learned that because synthetic detergent doesn't make strong dative bond with $\ce{Ca^2+}$ or $\ce{Mg^2+}$, you could use it in hard water. But I couldn't understand why soap makes strong dative bond and synthetic detergent doesn't. For example, why $\ce{-SO3-}$ doesn't make strong enough dative bond to make scum with $\ce{Ca^2+}$?
Why sulfonate of detergent is less likely to bind to ions present in ...
2021年7月14日 · By contrast, usual soap produce calcium alkylcarboxylates (like oleate, palmitate, etc.) in hard water, and these compounds are not soluble in water. Soap may be a good detergent : it removes stains. But it replaces the stain by a deposit of calcium carboxylate. This is not what is expected when cleaning dirty clothes.
molecular structure - Difference between Soap and Detergent
2020年6月20日 · The main difference between soap and detergent is the effects they produce when dissolved into pure water or tap water. Usually, tap water contains calcium carbonate, or at least calcium ions. When dissolved into tap water, soap reacts with these calcium ions, producing an insoluble substance which could be called "calcium soap".