Does colloidal silver contain lead?  If so, how do people who use it avoid lead poisoning?
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Colloidal silver probably does not contain lead. It is supposed to be a suspension of silver ions in water. However, as the various formulae out there are largely unregulated, and the amount of silver varies widely from what is stated on the label, it's hard to know what else might be in any given brand.\n\nMoreover, colloidal silver is not the miracle cure-all it is touted as, nor is it harmless. It can cause argyria, a condition in which silver salts deposit in the skin, eyes, and internal organs, and the skin turns ashen-gray. The FDA has banned over-the-counter sales of colloidal silver, and it cannot be advertised as providing health benefits.\n\nIf it is sold as a supplement, without claims of health benefits, it is legal. However, silver is not an essential mineral. The links below have some more information.
354758
http://myweb2.search.yahoo.com/search?p=absorption+of+lead+on+kaolintic+clay&sp=1&fr2=sp-top&ei=UTF-8&fr=slv1-frz&SpellState=n-3122988400_q-Qj75G34etbs24XK4X3fioAABAA%40%40
700153
Measure the increase in lead content of different drinks, especially fruit juices, when poured into lead crystal.\n\nHow does the content increase the longer the juice stays in the glass?
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Calcium is scientifically documented to reduce the absorption of lead.  Milk is a good source of calcium.  Apparently, the lead and calcium 'compete' with each other for absorption in the intestines.\n\nThe following quotes are from the medical textbook: "Advanced Nutrition and Human Metabolism, 4th edition, by Gropper, et.at., 2005, p.389\n\n"Lead absorption is inversely related  to dietary calcium intake."  (This means the higher the calcium intake the lower is the lead absorption.)\n\n"Poor dietary calcium intake also is associated  with lead accumulation in blood and organs."\n\nThe authors list two medical journal references to support these statements:\n\n1) Barton J, Conrad M, Harrison L, Nuby S.  Effects of calcium on the absorption and retention of lead.  J Lab Clin Med 1978;91:366-76\n\n\n2) Bogden J, Gertner S, Christakos S.  Dietary calcium modifies concentrations of lead and other metals and renal calbindin in rats. Can J Nutr 1992;122:1351-60\n\nHope you find this helpful.
398158
You are wrong NATURAL lead is a mixture of four stable isotopes (read NON-radioactive): 204Pb, 206Pb, 207Pb, and 208Pb . These four isotopes are the end products of each of the three series of naturally occurring radioactive elements: 206Pb for the uranium series, 207Pb for the actinium series, and 208Pb for the thorium series. Twenty seven OTHER isotopes of lead, all of which are radioactive, are recognized.\n\nLead is used as shielding because of its density. Remember that there is nothing magic about lead. Wood, air or styrofoam for that matter would work as well, but because of the density differences the same amount of shielding provided by 1" of lead might take 30" of wood or 50" of styrofoam
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Lead is easily absorbed through contact with the skin, ingestion or inhalation.  If I remember correctly, it binds to hemoglobin in the blood and inhibits oxygen transfer much like carbon monoxide does so it slowly smothers you to death from the inside.
883128
Use a magnet. Iron is attracted to it, lead is not.
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Let me be the first to say this is a diabolical question that has led me on a merry chase through the Internet. Not having a virtual lab with both chemicals on hand, I consulted Erik B., a chemical engineer from Purdue, to get your answer. We discovered that there are many variables with this compound; your product is determined by the quantities of each chemical that you use. On one hand, you can produce a completely colorless form of silver that has been used in the past as a discrete poison. The most common product of this compound, however, is SILVER CHLORIDE [silver chloride] chemical compound, AgCl, a white cubic crystalline solid. It is nearly insoluble in water but is soluble in a water solution of ammonia, potassium cyanide, or sodium thiosulfate ( "hypo" ). On exposure to light it becomes a deep grayish blue due to its decomposition into metallic silver and atomic chlorine. This light-sensitive behavior is the basis of photographic processes. Since silver bromide, AgBr, and silver iodide, AgI, react similarly, all three of these silver halide salts are used in making photographic films and plates. Both the bromide and iodide are less soluble in water and more sensitive to light than the chloride. The bromide forms light yellow cubic crystals; the iodide forms yellow hexagonal or yellow-orange cubic crystals, depending on the temperature. Besides use in photography, silver chloride is used in silver plating, and silver iodide is used for seeding clouds. The chloride, bromide, and iodide occur naturally as the minerals cerargyrite, bromyrite, and iodyrite, respectively. Silver fluoride, AgF, forms colorless cubic crystals; it is much more soluble in water than the other silver halides. Incidentally, should you wish to try the home-grown poison, just like for photos, silver oxide gathers in the skin and reacts with light, creating a bluish-gray tint that is a clear signal of foul play. *Don't* try this at home.\n\nHappy Answering,\n~Tia~\nLive from the big, purple brain\nhttp://advision.webevents.yahoo.com/asktheplanet/brain.html\nASK YOUR QUESTIONS, CALL THE BRAIN - 212-382-3592
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B)   PbS  use the solubility rules. all leads are insoluble except with NO3, ClO4, and SO4....there is a list of solubility rules.
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Iron and lead are both elements, so in their pure form, they wouldn't contain any trace of the other.\n\nIn a given sample of rock, however, iron and lead might both be present in some quantity, along with other substances.  The percentage would depend on the sample, and would vary depending on the source.  However, the iron itself would still not contain lead.
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Put a metal which has higher activity than Silver
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Pb(SO4)2\nPbSO4  is lead (II) sulfate!
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Bullets are usually made of lead, with an outer shell of copper. Lead is a known carcinogen. It is not a good idea to mess with it, without the required permits and protection. I don't think it is worth the hassle.
12574
kind of.  these days, pencils are made of graphite, which is not harmful like lead is.  it can get caught under the skin, in which case you'll have a blackish gray mark underneath the surface indefinitely (i have one on my thumb).
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Without knowing what reaction you're trying to get, or everything else present, thats a difficult question to answer.\n\nIn a sense. you're forming a silver nitrate solution, but you have to knw all the spectator ions to know what reaction will actually occur.  The silver cation in solution needs to have a anion associated with it.  \n\nThe purpose may also have something to do with the variable solubilities of the silver compound that may be formed.  \n\nAnother potential reaction involves the nitrate as an oxidizing agent.
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who b8r than an indian to answer this question?\n\nok...the silver u have eaten is about 10^-6 m thin, that is 0.000006m, and if u want 1gm of silver this way u would have to eat about 10,000 sweets, so...the amount of metal you ate will not cause any significant change in your body. so, dont worry and i hope u enjoyed your sweet.    \n\nps: i have eaten loads of such sweets without ny problem to my health, but if u still wanna b completely sure, just pull off the layer of silver bfr u eat, its quite easy to do so, and as much fun as popping the bubbles in bubble wrap. :)
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As everyone knows by now, lead is poisonous. That is why we don't make lead pipes any more for plumbing (one of the potential reasons the Roman empire fell), or use tetraethyl lead to increase octane number in gasoline, or use lead-based paints. \n\nHowever, it is less well-known that lead is often radioactive. Natural lead is a mixture of four stable isotopes: 204Pb (1.48%), 206Pb (23.6%), 207Pb (22.6%), and 208Pb (52.3%). These lead isotopes are the result of the decay of uranium (Pb206), actinium (Pb207) and thorium (Pb208). There are also another 27 other radioactive isotopes of lead that are possible, but if they are present naturally, they are present only in tiny amounts. \n \n\n\nPb204 is only very slightly radioactive, with a half-life of 1.4e17 years (longer than the present age of the universe). Pb205 does not occur naturally, and has a half life of 1.53e7 years. Pb206, Pb207 and Pb208 are not at all radioactive. Pb210 is only present in trace amounts in the natural environment, and has a half life of 22.3 years. The decay products are alpha particles and beta particles, both of which are easily blocked (in contrast to gamma radiation).\n\nRecently, the State of Illinois determined that some products made with lead were contaminated with radioactive lead (see attached reference). However, on studying the problem, both the state of Illinois and the EPA decided that the hazards due to radiation were very limited.\n\nRemember, one increases substantially ones exposure to radiation by taking a plane flight, or by moving to Denver. The increase in radiation exposure has to be balanced against what is present in the natural environment. \n\nAlso, it is not clear how dangerous low levels of radiation are. There is a concept called radiation hormesis that has been around for a long time, but is now being reexamined carefully again. It is possible that small doses of radiation might be helpful in some cases (see reference).