Is lead (II) acetate natural or synthesized?
967105
Lead acetate is synthesized by mixing PbO with acetic acid.
887064
The main thing you need to know to figure out the ionic equation is whether the product is soluble or not.  In this case, PbSO4 and Mg(NO3)2 are your products, and lead salts are insoluble.  Thus, PbSO4 and any ion that is used to make this molecule is removed from the ionic equation:\n\nPb(+2) + 2(NO3)(-1) + Mg(+2) + (SO4)(-2) -> PbSO4 + Mg(NO3)2 (aq)\n\nbecomes:\n\n2(NO3)(-1) + Mg(+2) -> Mg(NO3)2 (aq)
433653
organic and inorganic
864183
Not to my knowledge but you could be the first to prepare one.  Remember that some elements are toxic in a few but not all of their oxidation states.\n\nI guess you could surmise that toxicity is somewhat correlated to abundance but that is not always the case and I would not stake my life on it.  The example you give of water and barium is not a good one because water is not an element.  Lead is way more abundant than gold but lead is toxic and gold is not.  And, as you point out, the dose makes the poison.\n\nBut there is a very rough inverse relationship in nature between an element's abundance and its toxicity.  In my view, another excellent building block for the Theory of Evolution.  That is, organisms would evolve using the most abundant substances or, at least tolerating them, leaving them susceptible to rarer substances that may interfere with processes developed to use or withstand the common stuff.
858462
Most of the elements in the periodic table are natural, but all of the lanthanoid, actinoid, and radioactive elements are synthesized...or manmade!
767795
Pb2+ + 2I- <----> PbI2 (s)? \nMost often this reaction is shown as a double replacement reaction as follows:\n\nPb(NO3)2 + 2 KI ==> PbI2¯ + 2 KNO3   \nSince both solutions have to be heated before mixing, you might think it is an endothermic reaction requiring heat. However, the Lead Iodide precipitate will not form till the mixture is cooled. This would imply the reaction is actually endothermic since cooling or removing heat energy from the solution results in the precipitate.
875003
Silver acetate (AgC2H3O2) is a photosensitive, white crystalline substance commonly used as a pesticide. It also produces a repulsive taste when combined with cigarette smoke, so it is used in chewing gum and lozenges to aid the cessation of smoking.\n\nOther names Acetic acid, silver (1+) salt\nMolecular formula AgC2H3O2\nMolar mass 166.91 g/mol\nAppearance white to slightly grayish powder\nslightly acidic odour\nCAS number [563-63-3]\n\nProperties\nDensity and phase 3.26 g/cm3, solid\nSolubility in water 1.02 g/100 g (20 °C)\nBoiling point decomposes
942303
The Roman naturalist, Pliny, used the name galena to describe lead ore.\n\nhttp://webmineral.com/data/Galena.shtml
356643
The average atomic weight of Lead (Pb) is 207.20 AMU.\nThe molar weight of Lead is 207.20 grams per mole.
64690
NA2SO4,KOH,AGCL,CA(NO3)2 ARE SOLUBLE.AND HG2BR2 AND CDS IS INSOLUBLE.
1104136
Believe it or not . . . \nThere's no lead in pencil lead!\n\nThe center of the pencil -- known as the writing core -- is made of a nontoxic mineral called graphite. \n\nGraphite came into widespread in the 16th century, following the discovery of a large graphite deposit in Borrowdale, England. As the story goes, a passerby found bits of shiny, black graphite clinging to the roots of a fallen tree. The whole countryside was abuzz with talk about this mysterious mineral, which soon came to be known as "plumbago" or, more commonly, "Blacklead."\n\nGraphite left a dark mark, making it ideal for use by writers and artists. But it was so soft and brittle that it required a holder. At first, sticks of graphite were wrapped in string. Later, the graphite was inserted into wooden sticks that had been hollowed-out by hand! The wood-cased pencil was born. \n\n\nGraphite in America.\nIn 1821, Charles Dunbar (the brother-in-law of author Henry David Thoreau) discovered a graphite deposit in New England. This graphite was certified as far superior to any previously found in the United States. With this high-quality material for its writing cores, the Thoreau pencil company came to be known as the maker of the finest pencils in America.\n\nGraphite in Siberia.\nWhile searching for gold in the streams of Siberia, French merchant Jean Pierre Alibert came upon some very round, very smooth pieces of pure graphite. Reasoning that they must have been carried a long distance downstream, Alibert trekked some 270 miles until he found the source of his discovery. \nAlibert had supplies packed in by reindeer to set up a mine at this mountainous site near the Chinese border. During the first seven years of operation, the mine produced graphite of marginal quality. Then a rich and unbroken deposit of the highest-quality graphite was uncovered, a find that yielded pieces of pure ore weighing as much as 80 pounds! Pencils using Asian graphite were painted yellow as an indication of the source of the superior material in the writing core.\n\nToday's writing cores are a mixture of graphite and clay. \nBy varying the ratio of graphite to clay, pencil makers can adjust the "hardness" of the writing core. \n\n\nThe hardness of the core is often marked on the pencil -- look for a number (such as "2" or "3"). The higher the number the harder the writing core. You might see other markings on pencils. Some pencil manufacturers use the letter "H" to indicate a hard pencil. Likewise, a pencil maker might use the letter "B" to designate the blackness of the pencil's mark. The letter "F" is also used to indicate that the pencil sharpens to a fine pont. \n\nPencil makers also use combinations of letters -- a pencil marked "HB" is hard and black; a pencil marked "HH" is very hard, and a pencil marked "HHBBB" is very hard and really, really black!
266285
That would be arsenic, As. It's found in the p-block of the periodic table as a metalloid. Group 15 (or group V, depending on the notation).
750811
Your question makes no sense.\nIf I understand correctly you are making artificial sea water by making a solution of KCl, HNO3,Hg(+2), then you are adding Pb(+2) and Cd(+2) to known concentrations... measuring potential (what method?) and you want to determine the concentration of...what? You know the concentrations of all species (unless a reaction is taking place)
125578
chitosan is a biopolymer derived from chitin which consists of B1-4 linked N-acetyl glucosamine and glucosamine residues. The lead is chelated by the amines (I think) and can then be mechanically removed.
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
1011417
Just how "pure" do you want it?\nTo what purpose do you intend to use it?  Perhaps if we knew this, we might be able to advise on what types of impurities would be considered acceptable for your application.\n\nThere are numerous inexpensive and easily accessible sources of lead available, but they all contain some degree of impurities.\n\nIf you want ultra pure lead, your best bet (although it will cost you) will be to buy it through a chemical supplier...if they will sell it to you as an individual.\n\nAnother option would be to chemically extract it from lead containing substances.\nLead is not exactly the most reactive metal out there, so it shouldn't be too hard to device a chemical reaction to extract it from a Pb compound.\nFor example, using soluble Lead Nitrate, out could precipitate out Lead metal using a more reactive pure metal.  This process might not be ideal for your particular application, but if you look around and do a bit of research, you might find something acceptable.
203972
I've done some research on this because I seem to remember my teacher talking in school about how they can make batteries with graphite (pencil lead) and vinegar that put out more energy and are more environmentally safe than regular batteries. I'm not sure how this happens but I know that you can take vinegar and pour some into powdered graphite, rub it into a block of wood, and when the vinegar dries the wood will be extra strong because the vinegar disolves the graphite long enough for it to bind to the wood. I can't find any research or projects to back this up but that is what I remember on the subject. Perhaps you could split a pencil and drop the lead in for a few days and see? Maybe use two and a nine volt battery and see what a current does to affect the chemical process...I wish I could help you more.