what is the chemistry reason why a paper clip will float on clean water but not soapy water?
365541
this does in fact relate to surface tension.  But if we want to look at this a little further...water is held together by intermolecular forces with one of the strongest being hydrogen bonding.  This is the reason there are water drops.  When a paper clip is set on clean water the hydrogen bonding and other intermolecular forces are strong enough to keep the paperclip afloat.  When soap is added to the water it begins to weaken the intermolecular forces of the water molecule.  When the paper clip is placed on top it will sink to the bottom.  These same ideas work for the little water bugs "walking on water".
315092
Water and impurities in the water cause friction.
966389
Because it is quite a mild solution. There's plenty more water than acid, therefore you may assume that the properties of the water haven't changed much.
1013125
im assuming you mean bubbles in a drink, not soap bubbles in the air,.\n\nthese are affected by drag and hydrostatic forces.\n\nas the bubble (which has a flexible form) moves upwards through the water, the outer skin of the bubble interacts with the water. this drag causes the bubble to be slightly pulled in one way or another. this slightly deforms the bubble, and this causes its direction to change.
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.
191138
The fibers form small cells which the water can fill. Wetting (a form of adhesion) of the fibers and surface tension (on water surfaces not contacting the fiber) tend to hold the water in the cells.
803594
The previous two answers are correct.  The surface of a still body of water is one of few naturally occuring situations producing a clear reflection.  Gravity, molecular motion, the freedom of molecules in a liquid to move to positions of lowest energy, and an index of refraction that differs from air all contribute.  Mercury is much better, since its reflectance is nearly 100%.  The surface of a pool of mercury is a nearly perfect mirror.
340627
The atomic bonds in sugar are very tight and do not allow for (measurable) ionization, which is what helps water conduct electricity.  Salt (NaCl) is a powerful ionization agent - the Cl atom "steals" Na's outer electron, forming a Na+ ion, which attracts new electrons introduced into the water.  We call that a conductor!
418087
This is very similar to the floating of a (slightly oily) needle on the water. Surface tension acts like a stretched elastic membrane. The water is always trying to minimize its free surface area (that is, surface that is not contacting and wetting some solid).\nWhen you put an unwettable object on the water it stretches the surface which increases the surface tension. This tension holds up the needle. When you push a tube with an unwettable inner surface into the water, the surface tension tries to minimize the unwetted surface area by not rising into the tube. It will reach a level in the tube that balances the bouyancy due to the immersed air with the surface tension.
68685
water with salt bcoz water bcoms lighter wen alt dissolves in it ans hence its density decreases allowing it to evaporate easily
263044
when soap is mixed with water, it increases the surface tension so that when air bubbles get underneath, cant break through the increased surface tension.
638255
Because water is polar and like dissolves like.
143476
It's Surface Tension! Molecules on the surface of a liquid have a strong attraction to each other, since there aren't any other molecules pulling on them from the air above. This forms a kind of elastic skin.\n\nWater striders (insects) can walk on top of the water because the surface tension is strong enough to hold them up.
708673
It depends on the paper clip. Not all paper clips are going to have the same mass, as not all paper clips are identical. In part it will depend upon the material that makes up the paper clip, any faults in the paper clip, the style of paper clip, and other factors.
292220
Surface tension. The tape holds the balloon in place.
383164
basic answer: if the scope is charged, that means there are an excess of like charges all stuck together. like carges repel, but they have nowhere to go since there are no conductors around. you're body, mostly water, is a decent conductor, so when you touch it, the charges are free to move farther apart from each other by going into your body. the charges leave the scope until the excess charge is neutralized.\n\nmore accurate: actually, positive charges don't move, since positive protons are stuck in the atoms, but negative electrons are free to move in a conductor. when something is positively charged, it didnt gain positive charge, but lost electrons. when you neutralize it, electrons flow FROM your body to the scope. this is really the same as a net positive charge leaving the scope, but that isnt whats actually happening at an atomic level
700970
A soap or detergent is made up of molecules that contain both a charged part, and a large uncharged part.  The non-charged part attaches to things like grease, which are non-polar, while the charged part is soluble in water, which is polar.  When it does this, it carries the non-polar molecules into solution with it.