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Firstly, it is important to know the chemical structure of soap. Soap is made of a long hydrocarbon tail (R), which is hydrophobic (water fearing) and a polar, hydrophilic head, made of a COO- group connected to some cation (usually Na+). Now, for example, imagine a surface covered in oil placed in water. The oil will remain on the surface and not mix with the water. If a soap is added the hydrophobic hydrocarbon chain is attracted to the non-polar oil and bonds via dispersion forces, while the positive COO- head is attracted to the water, thus you have the tails in the oil and the heads in the water. Now, if the water is agitated the hydrophilic heads will want to move with the water, as the head of the molecule moves, so to does the tail, thus the tail moves into the water, still connected to the oil, removing the oil. A diagram such as this will help in understanding: http://en.wikipedia.org/wiki/File:Soapfunction1.jpg

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Related Questions

How does soap help to remove dirt?

Soap molecules have a hydrophilic (water-attracting) end and a hydrophobic (water-repelling) end. When soap is mixed with water, the hydrophobic end attaches to dirt and oil, while the hydrophilic end allows them to be rinsed away. This process helps to lift the dirt from surfaces and emulsify it in water for easy removal.


What will remove oil and dirt best without using soap?

detergent


Why does detergent work for clothes and not soap?

Detergent is specifically formulated to remove dirt and stains from clothing fibers, as it contains surfactants that help break down oils and dirt. Soap, on the other hand, is less effective on clothing because it can leave a residue that dulls colors and attracts dirt.


How can I effectively remove dirt from rocks?

To effectively remove dirt from rocks, you can use a combination of water, a brush, and mild soap. First, rinse the rocks with water to loosen the dirt. Then, scrub the rocks gently with a brush and mild soap to remove any remaining dirt. Rinse the rocks thoroughly with water to ensure they are clean.


Can soap remove pathogens?

Soap and water provide a medium in which dirt is lifted from the skin and is mixed within the medium created by the soap and water. As the soap and water are rinsed off the skin, the dirt is carried away as well.


How does water help us wash clothes?

The soap is the stuff that breaks down the dirt and grime, the water washes the dirt and grime away with the soap


Is hand soap a base or acid?

Hand soap is generally a base because it is formulated to be alkaline in order to help break down oils and grease. This alkaline nature allows the soap to effectively clean and remove dirt from hands.


Why does soap and water remove dirt?

Soap molecules have both hydrophobic and hydrophilic ends, allowing them to surround and lift dirt particles from surfaces. When the surface is rinsed with water, the dirt particles are carried away by the water, leaving the surface clean.


How can I effectively remove dirt from surfaces?

To effectively remove dirt from surfaces, use a combination of water, soap, and scrubbing. Start by wetting the surface with water, then apply soap and scrub with a brush or cloth. Rinse with clean water to remove the dirt. For tougher stains, consider using a cleaning solution or a specialized cleaner.


Advantages of using soap?

Soap helps remove germs and dirt from people and objects. There are many forms of soap from body soaps to cleaning supplies.


How is laundry soap?

Laundry soap is designed to remove dirt, stains, and odors from clothing and fabrics during the washing process. It contains surfactants and enzymes that help break down and lift away dirt and grime from the surface of the fabric, leaving clothes clean and fresh. Choosing the right laundry soap for your needs, such as considering sensitivities or fabric types, can help you achieve the best results.


What is the purpose of soap in the catalyst demonstartion?

I was looking for an answer rather than supplying an answer. I believe that soap is used to help remove dirt, to make the surface (skin or clothing) slippery to remove dirt. In other words, if you don't have dirt, water is sufficient. If soap remains on the skin it can clog pores and lead to B.O.