what does precipitant mean?
337953
Rushing or falling headlong. \nActing with or marked by impulsiveness in thought or action; rash. See Usage Note at precipitate. \nAbrupt or unexpected; sudden
327515
The pressure that the substance is under. At room temperature for example, water can be ice, liquid, or steam, depending on the pressure of the room or container.
31056
No, it means that you should take your umbrella with you, because the humidity in the air, and the pressure system suggest it could rain.  Weather prediction isn't exact science, so basically... they never KNOW for a fact if it is raining or not... no matter what percent they give.
382235
Ionic precipitation is when two ions say Ba+2 and a S-2 get together and precipitate into BaS2 (ppt) which in insoluble. Which is different if two organic molecules react to form an insoluble substance.
775966
The "dynamic equilibrium" means this: suppose you make a saturated solution of some salt, and add a little more, so there will be some solid salt present.  There will be an ongoing (dynamic) process such that some of the solid will be dissolving, while some of the salt in solution will be precipitating, continuously.  But overall, the amounts of salt that are dissolved and solid stay constant.
706188
It means, if you look at billions of days with weather conditions just like this day, 20% of them would be days with rain.\n\nI'm not a pro.\n\nBTW, when they give people stats and predictions, wherein it rained 40 out of a hundred times that the weather person said there was a 40% chance of rain, people tend to think the weather person was a lousy predictor.\n\nEven though the stats suggest they were a perfect predictor.\n\nFolks just don't understand this stuff, do they?
149401
when it rains, it pours.\n\nHope you don't live on/near a hillside.
843035
Precipitation Treatment (or hardening) is a heat treatment technique to improve the strength of aluminum alloys.\n\nA typical aluminum alloy will contain mostly aluminum, but also some copper (could also contain; magnesium, silicon, zinc... but the idea is the same).\n\nThe strength of a metal is very dependent on its microscopic grain structure (microstructure), since deformation of a metal is caused by the propagation of discontinuities in the microstructure, thus grain size, crystal type, inclusions, all effect its strength.\n\nImprove the grain structure and you improve the allow. What precipitation treatment involves is first heating up the allow to a prescribed temperature - This causes all the alloy metals to completely disolve in the aluminium (and gives a randomly diffused solid structure). Next (typically) the metal is quenched (ie. for example in water to rapidly cool it) - This results in a super-saturated solution of the alloys in the aluminum. Finally, the metal is aged (volkwagen used to dump their new engine blocks out in a field for a few months) to allow time for the alloys to precipitate out of solution. The result is a nice uniform small grained microstructure where the small alloy precipitates reinforce the lattice of the aluminum.
143492
to my knowledge, it means mist or dew
515441
wet ready mix has to be transported in a limited time to the point of use - keeping it moving (agitated).\n\nDry mix can be transported (as long as it is kept dry) over longer distances/times and mixed at point of delivery.\n\nThis means that wet mix plants have to be near a point of use.
444733
Unsaturated.  The air can still take on more humidity.  When the dew point is at or above the air temperature, you have fog or other percipitation.
1053336
It means to ensure that you are ready for action or for a crisis. In the age of muskets, soldiers kept little bags of gunpowder to use in loading their guns. If the powder got wet by falling into a river or being exposed to rain, then the soldier couldn't fight because their gun wouldn't work. When someone tells you to "keep your powder dry", they mean to make sure that you're not going to come up short in a crisis because you haven't taken care of business ahead of time.
108325
condensation is the liquifcation of moisture in the air from a gas to a solid. vapor turning in to water for example.
1181467
i would say it's a colloid\n\ncolloid="In general, a colloid or colloidal dispersion is a substance with components of one or two phases, a type of mixture intermediate between homogeneous solution and heterogeneous mixture with properties also intermediate between a solution and a mixture."----basically meaning solids suspended in a liquid
883409
I will assume that "salt" is referring to sodium chloride, NaCl.  The solubility of NaCl increases with increasing temperature and decreases with decreasing temperature.\n\nSince you are starting with a saturated solution (meaning that it contains the MAXIMUM amount of NaCl at that temperature) and you are cooling the solution to 20oC from 60oC, the cooler solution will not be able to keep the NaCl dissolved and you will observe small crystals of NaCl precipitating from the solution.
479476
You need to know concentrations to determine the amount of substance that precipitates out by using solubility products. In this case the precipitate will be CaSO4, so the solubility product will be given by:\n\nk=[Ca(+2)]*[SO4(-2)]\n\nWhere k is the equilibrium constant (probably a given), and [Ca(+2)] & [SO4(-2)] are the concentrations of Ca(+2) and SO4(-2) in the solution. Any amounts greater than the equilbrium concentration will precipitate out as a solid.
113958
In any reaction, white ppt formed implies that there is a compound formed in the solution  during the reaction which is white in colour and insoluble in water. So, it remains undissolved in water at the bottom like a white powder. This is called as white precipitate (ppt)