silica test in mineral water?
341828
Your question is incomplete and I do't know what you want to know about silica test in mineral water, whether you are curious if there is such a test? or whether you wish to know what is the test for silica in mineral water? or you are offering me silica test in mineral water?\n\nNever mind. I guess you want to know how silica can be tested in mineral water. I would do it by evaporating all the water from the sample and any solid residue is dissolved in acidified sodium fluoride. This gives SiF4 which is a gas and the gas is made to react with water to form white silicate solids. This is a good qualitative test but there are better tests using kits that can be bought. They use metals to bind with the silica.
971873
The ones that I use in testing precious stones are :-\n1) Bromoform - Density of 2.90 and can be diluted with toluol.\n2) Acetylene tetrabromide - D. = 2.95 can be diluted with toluol.\n3) Sonstadt's solution. Saturated solution of potassium mercuric iodide in water D. = 3.18 can be diluted with water.\n4)Klein's solution. Saturated solution of cadmium boro-tungstate in water D. = 3.28 can be diluted with water. \n5) Methylene iodide (CH2I2) D = 3.32 can be diluted with toluol\n6) Rohrbach's solution Saturated Barium mercuric iodide in water D.= 3.58\n7)Methylene iodide with dissolved iodine and iodoform D = 3.6\n8) Clerici's solution Saturated solution of thallium manolate and thallium formate in water D = 4.15 can be diluted with water.\n\nAll of these liquids are POISON and most give off noxious fumes so they must be handled with great care.\nThey are also, I regret to say very expensive.
814606
pH samples need to be analyzed immeditely for regulatory purposes.  There is no holding time.  They must be test ASAP.
1113033
Go to a local pool store. Bring a sample of your water in and have them check it out and give you the goods to keep it clean and clear
107720
I believe that Silicon Dioxide is Quartz
488134
It measures mineral hardness.
1028869
For some values of difficult to test.\n\nTypically, inorganic compounds are ionic in nature, so you're more likely to get chlori*d*e than chlorine (you do appreciate the difference, right?) so you can do things like addition of silver nitrate to get a ppt.\n\nHowever, you can also run mass specs and things - chlorine has a typical splitting pattern here based on isotopic ratios and so in this instance it's probably just as easy to detect it in organic (if not more so) than in inorganic compounds
560605
With IR you can dilute your soln so you have a bit more of it and then stick it on a plate and check out the peaks. That can give you a good idea of what you have... or there is HNMR, and CNMR, but it really depends on how much you have of the substance. If you have a general idea of what it might be then check the PH and give it a good guess... or use an indicator that might form some kind of ppt. with the substance in the soln . I've found that a refractive index really isnt the way to go because it isnt as reliable as other tests. Gas chromotograpy and Thin layer chormotograpy both require a general idea of what you might be coming up with... GC can be sketchy and you dont want to loose any sample on a test that might not tell you much, same with TLC, you would haev to be careful with the slovent interaction with the "unknown" that you have.
111661
there are different levels of purity of water and other solvents. the more pure the solvent is the more expensive.\nfor most introductory labs or where the results aren't critical then walmart quality distilled or deionized water is ok.\nfor other purposes you'd want to use the really good stuff.
59061
The previous answer is correct, but silicon dioxide is referred to by many different names and appears in many forms.  It is most commonly known as silica, it commonly appears in nature as sand or sandstone, but it also appears in three crystalline forms, one of which is quartz.  Please review the source below.\n\nNeed an answer?  Ask your friendly neighborhood librarian!
208038
You can use R.O. (Reverse Osmosis) filters.\nThe last filter diameter should be smaller than 0.0001 micron so that stuffs like sugar, herbicide, pesticide,\nsalt, sugar, metal ion cannot get through. \nYou will get purist and healthy water.
1084118
Try Copper Test by points
96253
Calcite...my favorite mineral!!! (Calcium carbonate, get it?)\n\nHardness is the most obvious. Calcite is 3 on Moh's scale. Quite soft! and quartz is 7.\n\nA penny, a nail or knife, a glass plate, all will help you separate these two. The quartz will scratch everything there. \n\nOne more test, that I didn't put on your other list that is the best test here, the acid test. A dilute acid will fizz when applied to the calcite, while the quartz will not react at all. This is why all good geologists carry around a bottle of acid in the field. Quartz (sandstone) and calcite (limestone) can be deceptively similar in appearance. \n\nThese two are good examples of why you cannot rely on just color or shape. Both quartz and calcite come in a variety of colors, depending on the impurity, and both can be completely opaque.(Think of rose quartz, milky quartz, amethyst, etc, and realize that calcite has as much variety) Both can be very similar crystal shapes since they are both in the trigonal system. Both have a white streak. Both have a glassy (vitreous) luster. \nCalcite:\nhttp://webmineral.com/data/Calcite.shtml\nQuartz:\nhttp://webmineral.com/data/Quartz.shtml\n\nThere is one more online resource I think you should look at:http://www.mindat.org/\nWebmineral.com is better for the questions you have asked, but mindat.org is very comprehensive and will have photos of more variations of the minerals that might help you understand the challenge of picking which properties are best for which minerals. On a lab test, you may be given samples to test that you have never seen, and they may be minerals you have seen before but in a different form (yes- its a trick), so knowing your tests can save you.\n\nBy the way, I just noticed your question about why color should be used with caution for identifying minerals. I think this answer is a good example of that. Many minerals come in many different colors due to some small impurity in the mineral. Both quartz and calcite come in almost every color of the rainbow. Fluorite is another good example of a mineral that can come in many different colors. Other examples are the many copper compounds which come in various shades of blues and greens. Because there are so many different copper minerals with the same color you can't use the color as a diagnostic for any one of them.
491321
Deep J got it all...Another way  of testing for carbon(IV)oxide is by passing it through lime water(Ca(OH)2).The I.U.P.A.C name for lime water is calcium hydroxide....It turns milky when it is being passed through lime water...This is the cemical equation of the reaction... Ca(OH)2+CO2-CaCO3 + H2O..The milky substance is calcium trioxocarbonate(IV) which is the substance that is used in the production of chalks used in schools...
1159583
false. Are you looking for others to answer your homework? just type in diatoms and read about them. They are facinating, especially under the microscope. You may have some diatoms in your pool filter-called DE, diatomaceous earth, they help keep the water crystal clear. Read about them.
1114420
make sure you know the material you are being tested on
153653
Water from the tap has several ions in it.  Some are added by people (like fluorine) and some arent (like sodium).  Also, water from the tap has several impurities.  \n\nWhen water is distilled, it is purified.  This water is deionized (some people call it DI water).  The water is free of impurities.  Without impurities, chemical "tests" can be run very efficiently and effectively with water.