How would using acid help identify limestone and marble?
375585
dilute hydrochloric acid reacts with the carbonate component of the limestone and the marble, and a few drops on the surface of the rock will 'fizz' allowing identification  (non carboniferous rocks such as granite will not give any reaction) . I dont know the exact chemical reaction, but I think hyrogen or maybe carbon dioxide is given off, hence the fizz ( gas bubbles)
297800
How the hell did you manage to eat limestone?\nLime+lye are poisonous,but I dont think limestone is
704222
rain water is mildly acidic (carbonic acid) and so will dissolve minerals found in rock.  For example, if you look at an old building made from limestone the corners will be slightly round and the surface will be pitted.  This is because limestone is made from calcium carbonate which is easily dissolved by acids.\nThis is also the same effect which produces limstone caves and why the surface of rocks appear discoloured and weathered.
627781
Limestone becomes marble in metamorphosis.\nShale becomes schist.\nSandstone becomes granite.
943583
Magnesium is used in sparklers\nCalcium is use as calcuim carbonate (limestone)
328624
You will find most at stone shows which are held all around the world.  Verona, Italy, Miami and Las Vegas being some bigger ones.  Look at the shows website as well, you will find links to the companies directly.  Stone Expo is one of them.\n\nAnd if you want to antique a small amount of marble, try this, a cement mixer, puncture nails through it so the pointy part of the nails are exposed inside, fill with sand and marble and let it turn for 24 hrs to 7 days. The action will simulate the look of old marble.
500976
You can use either phosphoric acid solution (35%) or tannic acid solution (20%). Phosphates give a grey/black. Tannate gives a BLUE/BLACK. If you are trying to "parkerise" the surface there are a number of commercial parkerizing solutions available.
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...
324047
Look for any of these marks:\n\nSilver- Ster, Sterling, 800, 900, 925\n\nGold- 585, 9K, 10K, 12K, 14K, ect.\n\nIf they are unmarked:\n\nDo not acid test, especially silver! Take them to a Jeweler. Most of the time, they will tell you for free.
345535
Even magic 'eat through anything' acid can be diluted with water, plus there are ceramics that can contain just about anything corrosive, whether it's acidic or alkaline.
146066
The chemical formula is CaCO3 (calcium carbonate). \n\nThey probably wouldn't make toothpaste out of it if it had dangerous amounts of arsenic in it. However, the content does vary, since limestone forms in the ocean it will have concentrations of many elements that are found in seawater.  For example in some Florida limestone the concentration of arsenic is 3mg/kg (3 ppm).\n\nMarble is a metamophosed limestone (not a conglomerate). Often in construction trades, polished limestone is called marble, although to a geologist it is still not marble. \n\nIn some water treatment plants  limestone (thus marble) is used to REMOVE arsenic from water. \nhttp://water.usgs.gov/wrri/02grants/2002SD1B.html\n\nI would say if you don't have to put it in your aquarium don't do it. The far bigger problem than the arsenic might be that if your aquarium is slightly acidic it will begin to dissolve the marble, and make the water rather hard. I can't imagine this would be good for most freshwater fish.
290374
Calcium carbonate is a chemical compound, with chemical formula CaCO3.\n\nIt is commonly used as an antacid, and is the active ingredient in agricultural lime. It is a common substance found as rock in all parts of the world and is the main component of seashells and the shell of snails.\nContents\n[hide]\n\n    * 1 Occurrence\n    * 2 Preparation\n    * 3 Chemical properties\n    * 4 Uses\n    * 5 External links\n\n[edit]\n\nOccurrence\n\nCalcium carbonate is found naturally as the following minerals and rocks:\n\n    * Aragonite\n    * Calcite\n    * Chalk\n    * Limestone\n    * Marble\n    * Travertine\n\nEggshells are composed of approximately 95% calcium carbonate.\n\nTo test whether a mineral or rock contains calcium carbonate, strong acids like hydrochloric acid can be dropped with a dropper onto it. If it does contain the chemical, it will fizz and produce carbon dioxide; otherwise, it probably wouldn't react vigorously. For example, all of the rocks/mineral mentioned above will react with acid.\n[edit]\n\nPreparation\n\nThe vast majority of calcium carbonate used in industry is extracted by mining or quarrying. When pure calcium carbonate is required (e.g. for food or pharmaceutical use), it is prepared by passing carbon dioxide into a solution of calcium hydroxide: the calcium carbonate precipitates out, and this grade of product is referred to as precipitated.\n\n    Ca(OH)2 + CO2 → CaCO3 + H2O\n\n[edit]\n\nChemical properties\n\n    See also: Carbonate\n\nCalcium carbonate shares the typical properties of other carbonates. Notably:\n\n   1. it reacts with strong acids, releasing carbon dioxide.\n\n        CaCO3 + 2HCl → CaCl2 + CO2 + H2O\n\n   1. it releases carbon dioxide on heating (to above 825 °C in the case of CaCO3), to form calcium oxide.\n\n        CaCO3 → CaO + CO2\n\nCalcium carbonate will react with water that is saturated with carbon dioxide to form the soluble calcium bicarbonate.\n\n    CaCO3 + CO2 + H2O → Ca(HCO3)2\n\nThis reaction is important in the erosion of carbonate rocks, forming caverns, and leads to hard water in many regions.\n[edit]\n\nUses\n\nThe main use of calcium carbonate is in the construction industry, either as a building material in its own right (e.g. marble) or as an ingredient of cement.\n\nCalcium carbonate is widely used in the pharmaceutical industry, either as an antacid, a calcium supplement (approximately 600 mg of calcium per gram of calcium carbonate), or as a base material for tablets of other pharmaceuticals.\n\nCalcium carbonate is known as whiting in ceramics/glazing applications, where it is used as a common ingredient for many glazes in its white powdered form. When a glaze containing this material is fired in a kiln, the whiting acts as a flux material in the glaze.\n\nIt is commonly called chalk as it has been a major component of blackboard chalk. Chalk may consist of either calcium carbonate or gypsum, hydrated calcium sulfate CaSO4·2H2O.\n\nRecently, calcium carbonate has begun to replace kaolin in the production of glossy paper.\n\nIt is also the substance from which the lens of the mammalian eye is made.\n\nIn 1989, Dr. Simmons introduced CaCO3 into the Whetstone Brook in Massachusetts. His hope was that the calcium carbonate would counter the acid in the stream from acid rain and save the trout that had ceased to spawn. Although his experiment was a success, it did increase the amounts of aluminum ions in the area of the brook that was not treated with the limestone. This shows that CaCO3 can be added to neutralize the affects of acid rain in river ecosystems.\n[edit]\n\nExternal links\n\n    * International Chemical Safety Card 1193\n    * CID 516889 from PubChem
812969
The best use of HCl is for washing / cleaning the toilet bowels and ceramic tiles. It can effectively remove white scales usually deposited on the faucets , showers etc. (Use 5 times diluted for this purpose). DO NOT USE ON NATURAL MARBLE. It will instantly dissolve the upper surface of the marble tiles.\nIt only is a hard stain / debri removal agent NOT a disinfectant.\nBE VERY CAREFUL while using the acid as it can cause severe burns on skin and irreversible damage to eyes if in contact.
652833
A - A meander is a bendy bit of a river.\n\nC - A strange example though. A & B are physical/mechanical weathering and D is through the action of flora/forna. I'm not sure C actually happens often but it is the only chemical action.\n\nB - Limestone will dissolve in a weak acid. Another formation it produces are limestone pavements.\n\nHope this helps
348865
Any hardware store sells the acid as a drain cleaner and lime can be purchased in the gardening section. You will raise some red flags if you purchase the acid, though and they may not sell it to you if you are a teenager.
721787
Acetic acid is a fancy name for vinegar...if you mix it with baking soda it fizzes, that's evidence of acidity... also you can mix it with hydrogen peroxide. I can't think of an easy third test...maybe ammonium nitrate... all these tests would involve litmus paper by the way.
835925
Generally sandstones and quartzites are more weathering resistant. They tend to form mountains and ridges. Limestones and shales tend to weather more and form valleys. They can't hold a mountain up. \n\nDifferential weathering is where different formations or even bedding within the same formation, weather at different rates. Softer, less competent rocks weather faster than harder, more substantial rocks. Look at a road cut, some rocks stick out like massive sandstones, and underlying shales have weathered back into the hillside. The rocks have experienced the same weathering forces, but the shales have weathered faster. Look at a cross-bedded sandstone. Some bedding is prominent and sticks out, some has eroded back in the formation. Both are differential weathering.\n\nIn the big picture, the rocks on a mountain have resisted weathering, where the rocks in the valley floor have succumbed, Differential weathering.\n\nThe last part of your question; think of a cemetery. Which gravestones last the longest? Lots of pink granite ones, huh? Granite is a very hard metamorphic rock. It is the most resistant to weathering. Marble is metamorphosed limestone. Much harder than limestone, but still CaCO3 (Calcium Carbonate). Rain is slightly acidic, so marble will weather out, but very slowly. Sandstone is a sedimentary rock, softer than granite or marble. So there is your answer.\n\nI hope this helps.