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| | == Description == | | == Description == |
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| − | White, lumpy powder that is often used to make effervescent salts and beverages and as a leavening agent for baking. Sodium bicarbonate is also used in fire extinguishers and metal ([[gold|gold]] and [[platinum|platinum]]) plating baths. Sodium bicarbonate readily absorbs stains and odors, it is used in dry-cleaning preparations for textiles, carpet, plastics, and canework. It is also used as a mild abrasive in some scouring powders. Sodium bicarbonate is used in the neutralization step of alum tawing. | + | White, crystalline powder. Sodium bifluoride forms an aqueous solution that will etch glass. It is used as a [[disinfectant|disinfectant]] for hides and skins, a preservative for zoological specimens, and an ingredient in the production of [[tinplate|tinplate]]. |
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| | == Synonyms and Related Terms == | | == Synonyms and Related Terms == |
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| − | baking soda; sodium acid carbonate; sodium hydrogen carbonate; bicarbonate of soda
| + | sodium hydrogen fluoride; sodium acid fluoride |
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| − | [[[SliderGallery rightalign|sodium bicarbonate.jpg~Chemical structure]]]
| + | == Other Properties == |
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| − | == Risks ==
| + | Soluble in water. |
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| − | * Fisher Scientific: [https://beta-static.fishersci.com/content/dam/fishersci/en_US/documents/programs/education/regulatory-documents/sds/chemicals/chemicals-s/S25533.pdf SDS]
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| − | ==Physical and Chemical Properties==
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| − | * Soluble in water. Insoluble in ethanol.
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| − | * For a 0.1 molar solution, the pH = 8.3.
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| | {| class="wikitable" | | {| class="wikitable" |
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| | ! scope="row"| Composition | | ! scope="row"| Composition |
| − | | NaHCO3 | + | | NaHF2 |
| | |- | | |- |
| | ! scope="row"| CAS | | ! scope="row"| CAS |
| − | | 144-55-8 | + | | 1333-83-1 |
| − | |-
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| − | ! scope="row"| Mohs Hardness
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| − | | 2.5
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| | |- | | |- |
| | ! scope="row"| Density | | ! scope="row"| Density |
| − | | 2.159 g/ml | + | | 2.08 |
| | |- | | |- |
| | ! scope="row"| Molecular Weight | | ! scope="row"| Molecular Weight |
| − | | mol. wt. = 84.01 | + | | mol. wt. = 61.99 |
| − | |-
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| − | ! scope="row"| Refractive Index
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| − | | 1.376, 1.500, 1.582
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| | |} | | |} |
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| − | ==Resources and Citations==
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| − | * G.S.Brady, ''Materials Handbook'', McGraw-Hill Book Co., New York, 1971 Comment: p. 734
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| − | * Hermann Kuhn, ''Conservation and Restoration of Works of Art and Antiquities'', Butterworths, London, 1986
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| − | * Palmy Weigle, ''Ancient Dyes for Modern Weavers'', Watson-Guptill Publications, New York, 1974
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| − | * Photographic chemicals at www.jetcity.com/~mrjones/chemdesc.htm
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| − | * Richard S. Lewis, ''Hawley's Condensed Chemical Dictionary'', Van Nostrand Reinhold, New York, 10th ed., 1993
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| − | * Tom Rowland, Noel Riley, ''A-Z Guide to Cleaning, Conserving and Repairing Antiques'', Constable and Co., Ltd., London, 1981
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| − | * R.M.Organ, ''Design for Scientific Conservation of Antiquities'', Smithsonian Institution, Washington DC, 1968
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| − | * Random House, ''Webster's Encyclopedic Unabridged Dictionary of the English Language'', Grammercy Book, New York, 1997
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| − | * ''The Merck Index'', Martha Windholz (ed.), Merck Research Labs, Rahway NJ, 10th edition, 1983 Comment: entry 8726
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| − | * ''The American Heritage Dictionary'' or ''Encarta'', via Microsoft Bookshelf 98, Microsoft Corp., 1998
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| − | * ''CRC Handbook of Chemistry and Physics'', Robert Weast (ed.), CRC Press, Boca Raton, Florida, v. 61, 1980 Comment: ref. index = 1.376, 1.500, 1.582
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| − | * Gordon Hanlon, contributed information, 1998
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| | [[Category:Materials database]] | | [[Category:Materials database]] |