Ur: berrikuspenen arteko aldeak
Ezabatutako edukia Gehitutako edukia
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1. lerroa:
{{argitzeko|Urari|Ur (argipena)}}
{{chembox
| verifiedrevid = 477162647
| Name = Ur (H<sub>2</sub>O)
| ImageFile1 = H2O 2D labelled.svg
| ImageSize1 = 170 px
| ImageName1 = Estruktura
| ImageFileL1 = Water-3D-balls.png
| ImageSizeL1 = 121px
| ImageNameL1 = Modelo
| ImageFileR1 = Water molecule 3D.svg
| ImageSizeR1 = 121px
| ImageNameR1 = Modelo
| IUPACName = Ur<br />Oxidana
| OtherNames = Hidrogeno oxido<br />Dihidrogeno monoxido (DHMO)<br/>Hidrogeno monoxido<br/>Dihidrogeno oxido<br/>Hidrogeno hidroxido (HH edo HOH)<br>Azido hidriko<br>Azido hidrohidroxiko<br>Azido hidroxiko<br>Hidrol<ref><br>[http://www.merriam-webster.com/dictionary/hydrol Definition of Hydrol] Merriam-Webster</ref><br>μ-Oxido dihidrogeno
| Section1 = {{Chembox Identifiers
| ChEMBL_Ref = {{ebicite|correct|EBI}}
| ChEMBL = 1098659
| StdInChI_Ref = {{stdinchicite|correct|chemspider}}
| StdInChI = 1S/H2O/h1H2
| StdInChIKey_Ref = {{stdinchicite|correct|chemspider}}
| StdInChIKey = XLYOFNOQVPJJNP-UHFFFAOYSA-N
| SMILES = O
| CASNo = 7732-18-5
| CASNo_Ref = {{cascite|correct|CAS}}
| PubChem = 962
| ChemSpiderID_Ref = {{chemspidercite|correct|chemspider}}
| ChemSpiderID = 937
| ChEBI_Ref = {{ebicite|correct|EBI}}
| ChEBI = 15377
| RTECS = ZC0110000
| UNII_Ref = {{fdacite|correct|FDA}}
| UNII = 059QF0KO0R
}}
| Section2 = {{Chembox Properties
| Formula = H<sub>2</sub>O
| MolarMass = 18.01528(33) g/mol
| Appearance = solido zuri eta ia koloregabea, garden, izoztean urdin pixka bat <ref name="Braun 1993 612">{{erreferentzia|doi=10.1021/ed070p612|abizena1=Braun|izena1=Charles L.|izena2=Sergei N. |abizena2= Smirnov|izenburua=Why is water blue?|aldizkaria=J. Chem. Educ.|liburukia=70|alea=8|orrialdea=612|urtea=1993|url=http://www.dartmouth.edu/~etrnsfer/water.htm|bibcode = 1993JChEd..70..612B }}</ref>
|
| MeltingPt = 0 [[°C]], 32 [[Fahrenheit|°F]], 273.15 [[Kelvin|K]]<ref name="VSMOW">''Vienna Standard Mean Ocean Water'' (VSMOW) estandarrak 273.1500089(10) K (0.000089(10) °C-tan urtzen eta 373.1339 K (99.9839 °C)-tan irekitzen du.</ref>
| BoilingPt = 99.98 °C, 211.97 °F, 373.13 K<ref name="VSMOW" />
| pKa = 15.74<br />~35–36
| pKb = 15.74
| Viscosity = 0.001 [[pascal segundo|Pa s]] 20 °C-tan
| Self-diffusion coefficient = 2.299·10<sup>−9</sup> m²·s<sup>−1</sup> <ref name="waterdiffusion">{{erreferentzia|egilea=M. Holz, S. R. Heil, A. Sacco|izenburua=Temperature-dependent self-diffusion coefficients of water and six selected molecular liquids for calibration in accurate 1H NMR PFG Measurements|aldizkaria=Phys. Chem. Chem. Phys.|liburukia= 2|urtea= 2000| orrialdea= 4740–4742|doi=10.1039/b005319h|alea=20|bibcode = 2000PCCP....2.4740H }}</ref>
| RefractIndex = 1.3330
}}
| Section3 = {{Chembox Structure
| MolShape = Kurba
| CrystalStruct = [[Izotz|Hexagonal]]
| Dipole = 1.85 [[Debye|D]]
}}
| Section7 = {{Chembox Hazards
| MainHazards = Ito<br/>[[Ur intoxikazio]]a
| NFPA-H = 0
| NFPA-F = 0
| NFPA-R = 0
}}
| Section8 = {{Chembox Related
| OtherCations = [[Hidrogeno sulfuro]]<br/>[[Hidrogeno selenuro]]<br/>[[Hidrogeno teluro]]<br/>[[Hidrogeno polonuro]]<br/>[[Hidrogeno peroxido]]
| Function = [[disolbatzaile]]ak
| OtherFunctn = [[azetona]]<br/>[[metanol]]
| OtherCpds = [[ur-lurrun]]<br/>[[izotz]]<br/>[[ur gogor]]
}}
}}
'''Ura''' gai elkartua da, [[oxigeno]] [[atomo]] bat eta bi [[hidrogeno]] atomoz osatua (H<sub>2</sub>O). [[Giro-tenperatura]]n [[likido]]a da, usaingabea, zaporegabea eta koloregabea. Nahitaezkoa uste da bizitzarako, ez baita ezagutzen uraren gabezia osoan bizi den izakirik. [[Lur]]rean nahiko ugaria den gai elkartua da, hainbat leku eta itxuratan ageri dena: [[ozeano]]etan eta [[polo|plaka polarretan]] nagusiki, baina baita [[hodei]], [[ibai]], [[aintzira]] eta bestelakoetan ere. Urak lurrazalaren % 75 estaltzen du. Ur horren % 97,2 [[ur gazi|gazia]] da, eta % 2,8 [[ur geza|geza]]. Ur geza horren % 1 baino ez dago egoera likidoan, gainerakoa [[Polo geografiko|poloetan]] [[izotz|izoztuta]] baitago.
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