why is there a current trend in using natural ingredients (papayas) in soaps?
98540
the smell of it. some people like it and some people dont
189531
there are lots of sites on the internet that give you recipes for soap.just punch in soap making.
69391
Soaps generally are only used to lubricate your hands (or other areas) to allow bacteria to 'slide' off. People think soaps act as an antibacterial but they are wrong. It is simply the lubricating affect of them that makes them useful. This also means that it doesn't matter whether you use hot or cold water either. Bacteria is not killed any better with hot water than it is with cold.
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.
211439
The soap has phosphate and nitrate salts that help to growth of aquatic plants in marine. increasing the growth of them will increase consuming of water oxygen,therefor the life of aquatic animals should be in hazard.
735055
a) Sodium stearate, a soap, forms a scum on bath tubs and shower screens with either magnesium, calcium or iron(II), as these salts are insoluble. For example:\n\n2CH3(CH2)16COONa  +  Mg^2+  ---> (CH3(CH2)16COO)2Mg  + 2Na^+\n\nb) Adding dilute HCl acid to soap, produces a greasy solid, which has its uses in cosmetics:\n\nCH3(CH2)16COONa  +  HCl  --->  CH3(CH2)16COOH  +  NaCl\n\nI hope that helps. If you need more assistance, please email me or re post.
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.
567607
Ash was a substitute for soap.\nPeople used ash or even soil for washing because the dirt sticks to the ash and is washed away with water.\n\nWith the advent of soap, which is more powerful (in washing) and more convinient than ash, it replaced ash.
823044
Here's what I found:\n\nDear Cecil:\n\nThere's a question that's been burning in the unscrubbed corners of my mind for a long time. We are told that Ivory Soap is "99 and 44/100% pure." What's in the other 56/100% (or if 0.56% if you prefer)? --Peter Holland, Chicago\n\nDear Peter:\n\nYou're not the first to wonder. Actually it consists of "foreign and unnecessary substances," by which I suppose they mean, for example, Dudley Moore. It all started in 1881 when Harley Procter, son of Procter & Gamble co-founder William Procter and a legendary soap salesman in his own right, decided he needed a new angle to hawk Ivory soap. Then as now people were impressed by scientific testimonials, and Harley decided if he could come up with a lab test showing Ivory was "purer" than other soaps, he'd win sales.\n\nTrouble was, there wasn't a standard for purity in soap, so Harley hired an independent scientific consultant in New York to concoct one. The consultant concluded that a 100% pure soap would consist of nothing but fatty acids and alkali, the somewhat yukky sounding substances that nonetheless are the chief ingredients of most soap.\n\nThat definition having been arrived at, Harley sent out some Ivory Soap for analysis and compared it with earlier analyses he'd had done of castile soap, regarded at the time as the best soap available. He was gratified to discover that by his consultant's definition, Ivory soap was purer than the castile soaps. The impurities consisted of uncombined alkali, 0.11%; carbonates, 0.28%; and mineral matter, 0.17%. Total: 0.56%. Thinking that "99 and 44/100% pure" had just the right touch of technical authenticity to appeal to the great unwashed, so to speak, Harley began sticking the phrase in Ivory advertisements, and another classic marketing slogan was born.\n\n--CECIL ADAMS
452959
please be careful with what you understand to be "natural" in thinking such things have a therapeutic value.\n\nturds are a natural product, you wish to bathe in those?
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.
127596
Probably because the dye that colors the soap is not a compound that froths and bubbles the same way soap does, if it does at all. It also might be spread out too much as the soap expands into bubbles to be seen clearly.
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.
1054520
"Saponification is the hydrolysis of an ester under basic conditions to form an alcohol and the salt of the acid. Saponification is commonly used to refer to the reaction of a metallic alkali (base) with a fat or oil to form soap."\n\n\nso in other words..soap is saponification
329313
Naturopathic doctors have been treating HIV with natural compounds for years the only reason you don't hear more about them is that they are suppressed by the FDA who are in cahoots with the big drug companies only because they can't \npatent a natural substance. Look at colloidal silver, olive leaf concentrate and grapefruit seed extract online and decide for yourself.
463201
Used to be used in the manufacture of soap, I believe.
481942
Soap is the sodium - Na - salt of a fatty acid, that is a salt obtained when a high carboxylic acid like palmitic acid etc. reacts with NaOH(caustic soda)&#92; or sodium hydroxide)\n\nIts chemical formula in its general form is R-COO-Na\nwhere R is an alkyl group of the form C(n)H(2n+1)-\n\nfor eg.- C(17)-H(33)-COO-Na\n\nwhere the H atom of the acid is replaced by the Na atom in a process called Saponification or salting of soap