albertlee Posted October 12, 2004 Posted October 12, 2004 When I am doing the experiment, mostly when dissolving something, My teacher requires us to use de-ionized water, why? what is de-ionized water? and Why just not use tap water?
YT2095 Posted October 12, 2004 Posted October 12, 2004 De-Ionised water contains only H2O. whereas tap water will contain Ions of Calcium, magnesium, Iron and even Chlorine and in some places Fluorine . these ions can mess up some experiments, for instance adding silver nitrate to tap water will imedietly turn it a milky color as the silver become silver Chloride (insoluble). it`s actualy the standard test for Chlorine Ions because it only needs a tiny amount for quite a dramatic reaction.
albertlee Posted October 12, 2004 Author Posted October 12, 2004 To YT2095, for the example ions in tap water like iron, Calcium, magnesium , and etc... Since they are ions, what are they combined with? give me few examples? Secondly, where do those ions get mixed up with the tap water? Albert
YT2095 Posted October 12, 2004 Posted October 12, 2004 Calcium is usualy in the form of a carbonate (you can see this inside your Kettle the next time you make a Coffee) the Chlorine is usualy Free. Magnesium is usualy the Hydroxide. and the Iron takes many forms. the Chlorine and or Fluorine is put in deleberately at the treatment plant, the rest is naturaly occuring from rocks and ores in the reservoirs and not usualy removed during treatment.
YT2095 Posted October 12, 2004 Posted October 12, 2004 that`s debatable dude. it has other effects too, when compounded with Fluoride toothpates to name just one. personaly I`m dead against Fluorination of drinking water, screw teeth, there`s plenty you can do to keep them healthy WITHOUT being subjected to mandatory toxins in your drinking water because the .Gov thinks it`s good for you! </end rant mode> LOL
5614 Posted October 12, 2004 Posted October 12, 2004 </end rant mode> LOL yeah, but what you said is dead true.... if it was good for your health but poisonouss (hmm, dont ask how!) then that would be one thing, but to have something poisonous and its only for the sake of keeping good teach, thats highly debateable; (and i think i agree with YT).
albertlee Posted October 12, 2004 Author Posted October 12, 2004 thx YT, for last questioning, Do you mean Calcium in the form of carbonate is Calcium Carbonate as well as Magnesium in the form of Hydoxide is Magnesium Hydroxide?
jsatan Posted October 12, 2004 Posted October 12, 2004 Yes he does, back to the Fluorine thing, I didnt know it was ba for your health, but so is chlorine is incorrectly dosed. O well the truth will come out one day as it always does, mercury lead etc etc.
jdurg Posted October 13, 2004 Posted October 13, 2004 in the small doses that fluoride is present in toothpaste and water, it's good for your health. At higher concentrations, it will cause your teeth to take on a mottled appearance. However, at this level it is still below the "toxic" level. In higher doses, it is pretty nasty and will royally mess you up.
albertlee Posted October 13, 2004 Author Posted October 13, 2004 Thx,, so is Florine in this case bonded as molecules?
YT2095 Posted October 13, 2004 Posted October 13, 2004 being so reactive it more than likely is! it`s unlikely to have "Free" chlorine in water whereas with Chlorine you can. as for what it bonds to, I don`t know, but I`de expect the greater reative metal ions such as Sodium (also present in Tap water but not in huge amounts). you must rem that I only gave the Majority particles a mention, sodium and phosphates also exist in tap water but at much lower (but NOT non-existant) levels
Gilded Posted October 13, 2004 Posted October 13, 2004 Btw, if you ever move to Finland, don't drink from a natural well. It's radonlicious. "personaly I`m dead against Fluorination of drinking water" Hmmh? I don't think we've ever had fluorinated drinking water here. Or then I'm just not aware of it.
YT2095 Posted October 13, 2004 Posted October 13, 2004 I`m basicly against ANYTHING that`s imposed upon me against my will when it comes to Foods etc... I`m a piad up citizen living in what SHOULD BE a democracy, and thus should have the choice, NOT have it impossed upon me and mine whether we like it not! again, I`m ranting, this isn`t what this thread`s about. Back On Topic... and unless the OP has any more questions to ask, I see this as an almost closed thread now
Gilded Posted October 13, 2004 Posted October 13, 2004 "I`m basicly against ANYTHING that`s imposed upon me against my will when it comes to Foods etc..." Btw, as we have already went a bit off the topic, do you have iodine salt in UK? You know, normal salt has some iodine added (duh).
YT2095 Posted October 13, 2004 Posted October 13, 2004 most isn`t iodised, but where I can purchase iodised salt I will. Rock salt from the Sea is great, not only for it`s purity, but it adds texture and interest to food, and also seems to be less "Salty" than the granulated powder crap you can buy.
Gilded Posted October 13, 2004 Posted October 13, 2004 I'm not sure if I've ever eaten non-iodised salt. Probably they put it in so much because of the high radiation dose we receive. Or some other mysterious reason.
YT2095 Posted October 13, 2004 Posted October 13, 2004 well common cheap as chips table salt here contains only NaCl and magnesium carbonate (anti-caking agent). Iodised salt is GOOD for ya, stop complaining )
Gilded Posted October 13, 2004 Posted October 13, 2004 "Iodised salt is GOOD for ya, stop complaining )" Who's the one complaining about drinking water. Well, maybe iodine in salt isn't as bad as fluorine in water.
YT2095 Posted October 13, 2004 Posted October 13, 2004 I`ll swap with you anyday! Actualy Iodine other than being generaly good for you in correct amounts, will only stop particular illness to the Thyriod gland as a result of "filling it up" with the NON-Isotope Iodine and thus not letting in any radioctive versions in. be carefull though, Iodine tablets are to be taken for short periods of time! pref 5 to 7 days before a Nuclear hazzard (yeah it bugs me too, HOW are you s`posed to know????) non the less, that`s all it does, it doesn`t make you radiation proof
Gilded Posted October 13, 2004 Posted October 13, 2004 ""filling it up" with the NON-Isotope Iodine and thus not letting in any radioctive versions in" "non the less, that`s all it does, it doesn`t make you radiation proof :)" Yeah I know that iodine isn't a wonder medicine that makes you immune to radiation. Now that I checked, I noticed that iodine-131 which is the fallout bastard of the iodine family, has a half-life of only 8 days. So that stuff has decayed a long time ago (I mean the Chernobyl accident), so probably Finns just don't get enough iodine from other stuff which is the reason they add iodine to table salt.
jdurg Posted October 13, 2004 Posted October 13, 2004 De-Ionised water contains only H2O. whereas tap water will contain Ions of Calcium, magnesium, Iron and even Chlorine and in some places Fluorine . Actually, you are a little bit incorrect there. You described Distilled Water which is slightly different than De-Ionised Water. De-Ionised water really contains no ions in it, but it can have other things like sugar, or non-ionic substances. Distilled Water, on the other hand, is just pure water. A LOT of people get that confused since it's basically the same thing, but Distilled is a bit more pure than De-Ionised.
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