What kind of residual do you get from ozonated water? And how do you test for it?
339824
Dang foo. This is not college proffesor ask around. There ain't nobody who can answer that.! Not even bill gates.
429253
If it generates more than 70ppm, then according to the EPA it is unsafe.  Personally, if you can smell the ozone, then it's unsafe.  This means that it's producing at least 30ppm.
11445
You need to be a little more specific. Would that be in water quality, oxygen in blood, or soil? To measure water quality they just use dissolved oxygen meter, which exploits the electrochemical properties of the water. Or you could do a Winkler titration.
96492
a test for unsaturation. In organic compounds, the unsaturation is due to presence of double (C=C) or triple (CΞC) carbon bond. \nThe test is performed as follows: To 1 ml of the aqueous solution of the organic compound in a test tube is added an aquieous solution of bromine (bromine water) dropwise. The mixture is shaken after each addition. The decolourisation of bromine water shows the presence of unsaturation in the organic compound.\nIn case the organic compound is insoluble in water, the test is performed by using the solution of compound in carbon tetrachloride and adding dropwise a solution of bromine in carbon tetrachloride.
510952
US EPA SW 846 methods try this
1164264
Go to a pool store and buy some test strips.  Lowes or Home Depot may stock them.
807568
lol look at the first two answers!\n\nlet's assume you are asking about big aquariums.\nthey make their own.  the have giant RO/DI (reverse osmosis/deionization) filters. They just pull out the chemicals, heavy metals and dissolved organics. Then they put back in vital trace elements, like magnesium, strontium, (and calcium but thats not 'trace').\n\nsmall aquariums, like in your kitchen\nstart with regular tap water, but pull out the chlorine and chloramines as well as copper, lead, etc. you can do this by mixing in something called 'Prime' by seachem. This website will tell you everything you need to know. \n\nPS--he talks about Prime, but Prime's label doesnt say that it binds heavy metals. it does. i dont know why they didnt put it on there. we actually called Seachem and asked them. They sent us this giant analysis of their stuff.
534827
Dissolved oxygen levels usually range from 6 to 14 mg/L. \n\nRemember, ambient temperature will have a significant impact on your readings, because the solubility of oxyden in water falls with a rise in temperature. So you'll need to take that into consideration while writing up your findings. \n\nI suggest that you take some readings at different times of the day, to establish a baseline. \n\nHope that helps.
1045839
GOLD-PLATINUM-PALLADIUM TEST\n\nSelect ore samples suspected to contain Gold-Platinum-Palladium and use concentrates equal to the size of one navy bean or pea. Place the concentrates in a clean test tube and add 1cc Nitric Acid and 3cc Hydrochloric Acid, (this a solution named Aqua Regia which is used regularly when testing.) Boil this over a lamp flame for about 5 to 8 minutes. Should this Aqua Regia solution contain Gold-Platinum-Palladium then the following tests will react with various colors, (good idea to practice on known samples of Gold-Platinum-Palladium for color and reaction identification and become familiar to them.)\n\nTest for Gold (Au).\n\nPrepare a solution for Stannous Chloride for each 8 hour period as this solution does not hold up under extended time periods. Dissolving Metallic Tin (Sn) in Hydrochloric Acid (HC1), where the resulted solution will be called Stannous Chloride (SnC1). Place about 2cc of HC1 in a clean test tube and add 1 or 2 small bit pieces of Metallic Tin to the test tube and bring this to a slight boil. You now have Stannous Chloride (SnC1).\n\nNow begin the gold test by making a spot test with freshly made Stannous Chloride by placing a piece of filter paper onto a clean piece of glass and place one drop of Aqua Regia solution in the center of the filter paper, and then add to this mixture one drop of freshly made Stannous Chloride solution. If gold is present there will show up on the filter paper a purple or rose colored spot when the filter paper has dried; the darker the color the more gold will be present; for low grade ore the spot color will appear plainer. Should the filter paper dry out completely, then add 1 more drop of Stannous Chloride solution to the filter paper to bring out the color.\n\nTEST FOR PLATINUM (Pt)\n\nBegin the test for Platinum (Pt) by placing 20 drops of Aqua Regia solution onto a clean porcelain evaporating dish and boil this over a lamp flame until it is dry, then allow this to remain over the lamp flame for about an extended one second.\n\nPlace the dish where it can cool for a few minutes so as not to break the dish. After cooling, place 4cc of distilled water, (or water free from Chlorine), and reheat just to the boiling point. Filter this solution onto another clean porcelain evaporating dish. Add to this dish, Potassium Iodide equal to one grain of rice. Warm this solution slightly over the lamp flame and observe the color that appears. The results for this test will show if Platinum (Pt) is present as the solution will begin to turn to a light or dark rose color within a few minutes time.\n\nThe more Platinum present in the solution, (ore sample), the quicker and darker the color will appear.\n\nSulphides and other impurities, most likely will give a red color to the solution and will be mistaken for the rose color, if so, then boil off about one-half of the solution to quicken the evaporation process. Then let the porcelain dish set until completely dry, then add a few drops of clean plain water, (no chlorine water). The result will then be a bright rose color, and should there be Sulphides or other impurities in the solution they will appear as colorless. If this solution should appear red, then add a few cc’s of plain water to dilute the dark rose color to a lighter rose color, then you have Platinum (Pt).\n\nTesting for Palladium(Pd).\n\nIn the test for Platinum (Pt), upon adding Potassium Iodide (KI) and warming the procedure, if Palladium (Pd) is present in the sample ore, the solution will turn a dark color or black, which depends upon the amount of Palladium (Pd) present. The more Palladium (Pd) present, the darker the color will be, and also there will be a black precipitate in the bottom of the porcelain dish, which when adding an excess of Potassium Iodide (KI) will dissolve giving a wine-red color appearance.
1073643
the easiest way is to use a pH paper to test the pH. and just compare the reading with the one given with the test kit. \n\nOr you may do some neutralisation. And then calculate with the  amount of alkali you use for neutralisation. By that you can calculate the concentration of hydroxide ions in the alkali that you use. Then calculate the pOH for the alkali you use. pH=14 - pOH.\neg. \n1mol of NaOH gives you 1 mole of OH ions.\nso the pOH = -log1 = 0\npH = 14 - 0 = 14\n\nJust some rough guide. Hopefully it helps...Good luck.
243830
There are a number of brands of ozonators on the market. They fall into 2 categories:\n1) Corona discharge units, which are harder to find and \n2) light generation units, which are more common.\nBoth have good and bad points. You can get them through most pool retail stores. Might be a special order item, but still available.\nHaving said that, I personally don' like the things. They give a false sense of security. You get to depending on them and then suddenly they let you down! You find out "after the fact" that the ozonator has quit working. Also, it's hard to test for ozone. Best advice: Stay away.
435888
have your water tested, it could be a virus, a bacterium, or even lead...have it tested ASAP
929177
First of all, make sure that your test kit's reagents are still good. If they've ever frozen or are over a year old, they're no good.\n If your reagents are good, then what about your chlorinator. You shouldn't need to use a floatie with a chlorinator at the equipment. Also, you ought to be putting more than 2 tabs in that chlorinator. The usual method is to half fill it and adjust the flow to it as needed on the dial. Perhaps the chlorinator is plugged. They do get mucked up.\n Are you testing for Total alkalinity? If not, you should be. It's more important than PH or Cl as it is what governs whether everything else works, water chemistry wise.\n Have you taken your water in to a pool shop to have the cyanuric acid (stabilizer) levels checked? Too low a stabilizer level and the cl gets zapped out by ultra violet in no time. To high a level is not good either and may require a partial pool dump and fill.Stabilizer levels affect Cl levels.\n\n Yes, it could be phosphates. Is your pool green or does it flip to green in hours? Usually caused by not having proper sanitizer levels or bad water chemistry ( that TA thing again)\n\n Are you shocking once a week.?Yep, you're supposed to. Shock ing over chlorinates the pool briefly, to get rid of what the chlorine pucks couldn't deal with during the week. No shock, no chlorine reserves left.\n There are many things unique to your back yard that may be doing this as well. Are there a lot of organics constantly falling in the pool? What's the bather load, is yours the only pool in town?
682738
There is a product made by HTH called pH Minus. (I'm sure there are other company's that make it as well), it's fairly inexpensive, around $14.00 for 1/2 gal. Just follow the directions and your water will be back to normal in no time at all. It works quickly! GOOD LUCK!
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
84238
Deionized water (known as "DI water" in labs) is used in chemical analysis.  When performing analytical chemistry, you don't want your water contaminated with the typical minerals you find in drinking water.  You just want pure H2O.
29497
I assume that in your experiment you are trying different things to see how they affect the longevity of the bubbles. However, you need a way to see if the changes will make any difference over the longevity of a "normal" bubble. ou do this by comparing each test (or changed) bubble to a normal, unchanged bubble. The bubbles you test that do not have any of the changes made are your control group. Hope this helps!