about water of crystalisation?
414281
Water of crystallisation is the water which combines with the salt during crystal formation and gets attached to it and results in some very interesting properties of the crystal..\n\nIt depends on the nature f the salt, the temparature, the time of crystallisation, the catalysts and other factors.\n\nTry searching on google to get more info on water of crystallisation.
583380
A crystal is non-living, does it make any sense for it to grow, as they do, 'knowing' what color to be, what shape and size and how many facets and what angles to have and what clarity and hardness to have and what refractive index to have and give off little baby crystals which will grow up in the likeness of the parent. You could liken our DNA to a kind of protein crystal, It 'knows' what to do because the data is contained within its molecular structure. There is no reason for it so it makes no sense but none the less, it occurs naturally. We have to accept that we were created by our genes as a mere vehicle for its own use.
25438
Ice crystalization begins at 32f.  At 33 it's just water.
169888
Yes, it does.  This is evident by water freezing in enclosed containers (such as pipes) and deforming them, sometimes even rupturing them.  \n\nWhen water molecules become cold enough to freeze, or change into a solid form, their crystal structure is less dense than when in liquid form.  This is due to the inherent shape of the water molecule and how the molecules line up in solid form.\n\nIf you live in a colder climate, it's a standard procedure to drain any remaining water out of things kept outside over the winter, such as boats, swimming pools, outdoor water pipes, etc.  Otherwise you can almost expect them to be ruined by the time you want to use them again.
24286
Stable in what regard?\n\nIf you want to know the compound which cannot be out-oxidated, it would be CsF, Cesium Fluoride. Dissolves in water fairly easily, so it isn't a stable crystal.
304001
I suggest that you create a supersaturated solution first. Reason being that the more highly saturated the solution, the better the formation of the crystal and the larger the end product. This can easily be done by heating your solvent to a very high temperature and stiring in copious amounts of whatever is going to make up your crystal. Lower the heat as it goes and you should idealy end up with a very viscous solution, not so much of a liquid but more to the kind of stuff you get when you mix a bit of cornstarch with water. Thereafter dump everything in a beaker or bowl and suspend a thin wax thread in the solution itself. Cover up the bowl and leave to set for a few days. If you have done it correctly you should see a very nice, large crystal forming. Just a note though, don't let the thread touch the bottom of the bowl or even any thing other than the solution, or your crystal will be lopsided
32450
Yes.  You can form a supersaturated solution with salt and boiling hot water in a glass jar.  Tie a pencil to one end of a string and a paperclip to the other.  Allow the pencil to rest on the top of the jar so the paperclip can hang in the solution, almost touching the bottom of the jar.  Allow the jar to sit undisturbed and you'll see crystals forming within 24 hours.
398032
http://en.wikipedia.org/wiki/Crystal
836098
Water vapor. If all water vaporize u will receive NaCl (crystal)  in vessel.
1174291
The water molecules align in specific order when making the crystals in ice.  This order takes up more volume than the random orientation they can achieve in the liquid phase.\n\nIn other words, the molecules can snuggle closer together as a liquid compared to a solid.
925136
A mineral is a solid, (generally) inorganic compound with a definite chemical composition and organized structure.  So, liquid water, not being a solid with a structure, would not be a mineral.  Ice, however, is technically a mineral.  (When it occurs in nature--sometimes the boundaries of our definitions are so arbitrary!)
321854
Crystallization occurs when an ionic compound (think table salt) which is dissolved in solution (think water)and the solvent(water) is subsequently evacuated. Table salt, or sodium chloride forms a crystal structure (like the granules you find in a salt shaker) in its solid state. The definition of a crystalline structure is characterized by a repetitive lattice-like pattern between the molecules. This salt example is not the only way crystallization occurs, but it's a good start.
999965
Use water, preferably from a source that you know is as pure as possible and is natural, like a stream.  If you wish to do some sort of ritual to bless the water, do that.  Take up a soft cloth, dip the crystal in the water and wipe it clean.  If, after a good scrubbing, there is still dirt, well, that's a natural thing, so just live with it.
680279
Technically a process can require the addition or extraction/removal of heat ENERGY.\n\nI cannot off the top of my head recognize a chem formula any longer, but adding oxygen to any system is oxidation and generates its own heat.  Tehcnically even iron rusting generates heat, just a very small amount, since any metal "rusting" is just it oxidizing.  \n\nAs far as the ice cubes, simply the removal of heat will not cause water molecule to become ice crystals,  I apologize, but I forget why.  I remember an experiment I saw and tried.  In a very clean container, pour distilled water. Now cover that container with another container that does not touch the first.  (Like putting a big bowl over a smaller bowl with the distilled water.  The water stays liquid all the way down to around -20 C.  But if you damage the stablility of the bowl by say gently tapping the side, the water will then turn to a solid.\n\nSnow in clouds form when the water molucle has a dust mote or other item to cling to and begin forming the ice crystal which eventually gets heavy enough to possibly fall all the way to the ground.
576279
when meth is processessed it become crystalised and is also called ice
736486
Recrystallization in water can have a good yield of product if the compound you are using is soluble in water. Water would not be a suitable solvent in all reactions because of its high boiling point I think.  It is important to choose a solvent which will not dissolve the substance at room temperature so that the pure crystals may be recovered. So it affects the yield of the crystals also. \n\nThis question did inspire me to research it because I couldn't recall the exact answer...though I'm sure we discussed it in class......\n\nA good solvent for recrystallization must:\n\n1. not react with the desired solid \n\n2. be easily removed from the desired solid \n\n3. dissolve a relatively large amount of desired solid at high temperatures (usually the bp) or not at all) \n\n4. dissolve impurities at all temperatures or not at all \n\nFrom what I read water is usually not good as a solvent by itself because it does not meet all of the above requirements....BUT as most compounds tend to violate one or more of these as well, water is often used in conjunction with other chemical compounds to form a solvent pair. Water IS a good solvent in the recrystallization of acetanilide due to the solubility of it in water. You would have to use the Merck guide to see the solubility of a compound in water to determine its suitability as a solvent.
853747
“Making your own Crystals”\n\nA crystal is a special kind of rock. Different crystals have different beautiful shapes and colors. \n\nWhat you'll need\n\n Your magnifying glass \n Table salt \n Epsom salt \n Honey jar \n Measuring cups and spoons \n Paper cut into circles \n Scissors \n Pencil \n String \n 1 3/4 cups of sugar \n 2 or 3 paper clips \n A glass jar or drinking glass \n Your science journal\n\nWhat to do\n\n \n\n1. Use your magnifying glass to look for crystals. Inspect: \n1. The table salt and Epsom salt; \n\nThe honey jar (particularly if it has been open for awhile) and \n\nThe walls of the freezer (if it's not the frost-free kind). \n\n1. Draw pictures of what you see in your science journal. \n1. Do all of the crystals look the same? \n1. If not, how are they different? \n1. Try dissolving salt crystals and forming new ones: \n1. Dissolve 1 teaspoon of salt in 1 cup of water\n1. Grown-up alert! \n\nHeat the mixture over a low flame to evaporate the water. \n\nWhat's left? \n\nWhat shape are these crystals? \n\n1. Snowflakes are made of ice crystals and are beautiful, but they are hard to see clearly. You can make paper snowflakes. \n1. Take a circle of paper (use thin paper) and fold it in half. Then fan fold it. \nMake cuts along all the edges. Unfold them. \n1. Grow rock candy crystals from dissolved sugar. \n\nGrown-up alert! \n\nPour a cup of boiling water into a dish and add 1 3/4 cups of sugar. Stir until the sugar is completely dissolved. Prepare a jar or glass as shown. \n\n\n\nWash the paper clips and use clean string. When the sugar water is cool, pour it into the jar and put it where no one will move it. Hang the paperclips in the water and put the pencil on top of the jar. \n\nSome crystals may form in a few hours. Some may grow to be half an inch on each side. To save them, take them out of the water and keep them dry. But they may disappear--they are good to eat. \n\nWhen certain liquids and gases cool and lose water, crystals are formed. Crystals are made up of molecules that fit neatly together in an orderly package. All crystals of the same material have the same shape, regardless of the size.