Originally posted by: ShawnD1
Originally posted by: michaelsslave
today is really the only day ive noticed this, but ive seen about 10 people throughout the day that will fake wash their hands. by that i mean, they will get their hands wet then scrub their hands and then dry them...without using soap. and yes im 100% they are not using soap, has anyone else noticed this?
Because, unlike you, they actually passed high school chemistry.
http://en.wikipedia.org/wiki/Soap
Soaps are useful for cleaning because soap molecules attach readily to both nonpolar molecules (such as grease or oil) and polar molecules (such as water). Although grease will normally adhere to skin or clothing, the soap molecules can attach to it as a "handle" and make it easier to rinse away. Applied to a soiled surface, soapy water effectively holds particles in suspension so the whole of it can be rinsed off with clean water.
(fatty end) :CH3-(CH2)n - COONa: (water soluble end)
The hydrocarbon ("fatty") portion dissolves dirt and oils, while the ionic end makes it soluble in water. Therefore, it allows water to remove normally-insoluble matter by emulsification.
Basically how it works is that soap is a long chain carboxylic acid where the acid part has been pulled off with either sodium or potassium hydroxide in order to make one end ionic while the rest of the molecule is nonpolar. The nonpolar end sticks to grease, and the polar end sticks to water. Here you're talking about washing your hands in the bathroom to remove what is presumably urine. How exactly did the urine leave your body? Oh, that's right, it was in water, because everything in urine is
soluble in water. If it's already soluble enough to leave your body, why the hell are you trying to use an emulsifier on it?
Chemistry should be mandatory before you're even allowed to vote or drive. Seriously.