how & why does soap work?
613753
Go to yahoo education for best answer
239122
Like adding food color to water, the soap would still be transparent.\n\nPut the item in whatever mold you use now.\n\nA craft store would have different shaped mold and would be a good place to get your questions answered for sure.
253912
http://en.wikipedia.org/wiki/Liquid_soap
715889
A soap bar should only be used for one person. When you live with more than one person it's best to get soap that is in a pump. Another good tip is to use an anti-bacterial Instant Hand Sanitizer such as Purell.
963521
I'll answer the last part of your question first. Soap is made up of polar molecules. That just means that one end of each molecule is different from the other like the poles of a magnet. One end dissolves in grease and fats while the other end dissolves in water. Since most really dirty things are fatty and greasy, this means that one end of each soap molecule sticks to the dirt on your hands while the other end sticks to the water running over them. This washes the dirt away. Why not use plain water? If you don't have soap plain water will help get you clean but because of surface tension water won't stick to grease so you will never get completely clean. Another class of cleaners solves this problem. Detergents reduce the surface tension of water allowing it to clean better. Look at the list of ingredients on your cleanser. If one of them is Sodium Lauryl Sulfate, your cleanser is a detergent. Now for the first part of your question. Long ago people found that you could make a cleaner by heating lard (renderings from animals killed for food) with potash, an alkali produced by burning wood, probably for cooking the aforementioned food. This discovery was probably accidental, the result of being in the right place at the right time. It took place so long ago that the discoverer (or discoverers, it probably happened in several places at different times) is lost in history. BTW. It's no coincidence that many of today's soap producers are owned by or connected to slaughter houses and meat producers. Do some research on Procter and Gamble. Your teacher will be proud of you.
209124
Hi there,\n\nSoap is able to remove oil from our skin because while you've rightly pointed out soap is made from oil, its chemical and molecular structure consists of 2 main parts that are attracted to oily substances (known as the hydrophobic part) and a part that is attracted to water-based or aqueous substances (known as the hydrophilic part). Because of this property, soap can break up the oil on our skin and bind it to the water- Allowing us to remove the oil from our skin.  As an aside, you should know that normally Water and Oil dont mix at all- If you add some some liquid soap to a mixture of water and oil you will notice that the oil and water will mix togther!! This is how the soap works to remove the oil from our skin by allowing the water you apply during a shower to mix and "wash" away the oil+soap mixture from our skin.  I hope that answers your question :-)
981789
Another one for wikipedia.com:\n\n"Many soaps are mixtures of sodium (soda) or potassium (potash) salts of fatty acids which can be derived from oils or fats by reacting them with an alkali (such as sodium or potassium hydroxide) at 80°–100 °C in a process known as saponification. The fats are hydrolyzed by the base, yielding glycerol and crude soap. Historically, the alkali used was potassium made from the deliberate burning of vegetation such as bracken, or from wood ashes.\n\nSoap is derived from either oils or fats. Sodium Tallowate, a common ingredient in many soaps, is in fact derived from rendered beef fat. Soap can also be made of vegetable oils, such as olive oil. Soap made entirely from such oils, or nearly so, is called castile soap. The use of the word "soap" has become such a household name that even cleaning solutions for the body that don't have soap in the ingredients are referred to as soap."\n\nThere you have it: fats or oils.
30267
If you're talking about the experiment where you put pepper on water and then touch a bar of soap to the surface, it isn't so much that pepper is running from soap, but rather that soap is pushing pepper away.  The pepper floats, suspended by the surface tension of the water.  When soap is added, it is able to reduce the surface tension.  THis makes the soap rapidly diffuse across the surface, and when it does, the water that was on the surface races to the periphery, carrying the soap with it.  If, after the sopa is added, you sprinkle on some more pepper, much of it will float--not quite as much, because the sopa reduced the surface tension and hence reduced the force which keeps the soap up, but it certainly doesn't race away.
524766
i'm guessing, its dried soap.. or your skin is really dry..
925071
Soaps made with animal fat usually contain another ingredient like lye, which is the only part of animal based soap that actually kills germs and provides any sanitation. The animal fat is simply the medium to hold the lye (and possibly a skin conditioner to counteract the harshness of the lye). Vegetable oil based soaps are made with saponified oils which have been processed in a manner that gives them a germ killing abilities and so can be used by themselves rather than in combination with other ingredients. Although, if you are making soaps yourself, I would recommend adding more powerful antibacterials like tea tree oil or lavender oil, especially since most people don't bother to wash their hands very thoroughly, if at all.
938642
eat soap....very simple, but effective.
132970
Ya you should cuz distilled water is not good as a conductor but adding salt to it makes it a good conductor of electricity and since soap contains alot of salts that can decompose into negative and positive charges i think ya u should worry about electric shock
459901
Here are step by step instruction:\nhttp://waltonfeed.com/old/soap/soapbach.html
903233
I have the EXACT same problem. Although i do not completely understand why, but if you use ANTI-BACTERIAL soap, and scrub really well it will work. It took me months of suffering... but I I'm better now. You must scrum HARD. Good luck listen and you will get results
179839
It depends on the salt. A salt of calcium, magnesium, or iron will form an insoluble compound that will precipitate with a soap molecule that is known as soap scum.\n\nHere is a typical reaction:\nCa2+(aq)  + 2C17H35COO-(aq)  ==> (C17H35COO-)2Ca2+(s)\n\nSodium chloride will not form a precipitate with soap as long as the soap is a carboxylate.\nhttp://dl.clackamas.cc.or.us/ch106-04/structur1.htm
180332
www.soapoperanetwork.com
676085
It really keeps our bodies. heat rises off of our bodies when it's cold outside, so the hair on our bodies do too to trap some of that hot air. Oil is everywhere on our bodies, It sticks to our skin so it doesn't dry out. Soap get rid of that oil. i.e when you wash your hands you get rid of the oil on your hands as well as dirt. You hands become dry, when you put lotion on them they feel pretty nice... or if you wait a while the oil gradually comes out of the oil pores putting oil where it used to be.