why hgso4 used in cod?
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The most general COD determination uses potassium dichromate (K2 Cr2 O7 ) in excess in an acidic medium with the aid of silver sulfate (Ag2 SO4 ) as a catalyst, and mercuric sulfate (HgSO4 ) added to remove interference of chlorides.
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Cod is lower in mercury than many other fish. Eating between 8 and 12 oz of cod per week should be safe for pregnant women. Other examples of very low-mercury fish are sardines and herring.
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Hexylene glycol (HG), also known as 2-meth- yl-2,4-pentanediol and as 2,4-pentanediol, 2-methyl, is used as a defoaming agent, coup- ling agent and emulsifier. ... Of the diols, propylene glycol (PG) is a well- known irritant and contact sensitizer (3-5).
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Scrubbers or Exhaust Gas Cleaning Systems (EGCS) are used to remove particulate matter and harmful components, such as sulphur oxides (SOx) and nitrogen oxides (NOx) from the exhaust gasses generated as a result of combustion processes in marine engines, to implement pollution control.
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A. Mercurochrome is a trade name for merbromin, a compound containing mercury and bromine. Merthiolate is a trade name for thimerosal, a compound containing mercury and sodium. ... Mercurochrome is not widely used anymore.
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A high-melting (decomposes above 280℃) white solid which is very soluble in water (70.6 g/100 g water at 0℃; 103.8 g/100 g water at 100℃), it is widely used as a fertilizer for alkaline soils. It has a role as a fertilizer. It is an ammonium salt and an inorganic sulfate salt.
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Hello! The compound that will form an acidic solution when dissolved in water is KHSO₄.
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HNO3 is a strong acid, therefore HNO3 and NaNO3 cannot function as a buffer. The rest are buffer solutions.
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Tetrasodium EDTA in soap. Why is it used? ... It increases the shelf life of your soap by chelating (binding up) certain metals that can cause DOS (dreaded orange spots, also known as rancidity). EDTA also reduces the amount of sticky soap scum formed when lye soap is used in hard water.
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Because DMSO is only weakly acidic, it tolerates relatively strong bases and as such has been extensively used in the study of carbanions. A set of non-aqueous pKa values (C-H, O-H, S-H and N-H acidities) for thousands of organic compounds have been determined in DMSO solution.
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Many thiols have strong odors resembling that of garlic or rotten eggs. Thiols are used as odorants to assist in the detection of natural gas (which in pure form is odorless), and the "smell of natural gas" is due to the smell of the thiol used as the odorant. Thiols are sometimes referred to as mercaptans.
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Advice varies on this. The Food and Drug Administration suggests that shark, swordfish, king mackerel, and tilefish contain high levels of mercury, with albacore tuna having higher levels of mercury than canned tuna, and shrimp, canned light tuna, salmon, pollock, and catfish having lower levels of mercury.
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SrSO4 is a salt of weak base and strong acid that is why it undergoes hydrolysis when dissolved in water. In order to dissolve and prevent its hydrolysis, keep the concentration of OH ions as low as possible and that is the case in acidic media.
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['HO2C2O2H – oxalic acid.', 'H2SO3 – sulfurous acid.', 'HSO4 – – hydrogen sulfate ion.', 'H3PO4 – phosphoric acid.', 'HNO2 – nitrous acid.', 'HF – hydrofluoric acid.', 'HCO2H – methanoic acid.', 'C6H5COOH – benzoic acid.']
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Cod Fish Nutrition Facts Like most other fish, cod is a good source of omega-3 and omega-6 fatty acids. It is also rich in vitamins B12 and B6, niacin, as well as vitamins E, A, and C. It is a good source of phosphorus, potassium, selenium, and other trace minerals.
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Seafood choices that are very low in mercury include: salmon, sardines, pollock, flounders, cod, tilapia, shrimp, oysters, clams, scallops and crab.
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Although Ag2CrO4 is insoluble in water, it is soluble in dilute HNO3.