Waikawa oxalic

Rahui diacid waikawa ki C2H2O4 tātai kerekere i huaina e nomenclature nahanaha waikawa ethanedioic. Kei te hoki i tenei pūhui mohiotia e te tahi atu ingoa ake noa - waikawa oxalic. I te tuatahi whakaputaina reira e te kēmihi Tiamana F. Wohler o Cyanogen (oxalic dinitrile waikawa) i roto i te 1824. tioata taekore o te waikawa rewa i roto i te wai ki te hanga i ngā wairewa taekore. Ko te taimaha titiwha 90,04 g / mol. I roto i te ahua rite tioata monoclinic taekore. I 20 ° C rewa i roto i te 100 g o te wai i 8 go o waikawa oxalic. Wairewa i roto i te hauwaiwaro, te waihā me te Ethyl Etere. Kiato 1.36 g / cm³. Rewa i 189,5 ° C, sublimes i 125 ° C, decomposes i 100-130 ° C.

āhuatanga matū katoa āhuatanga o te waikawa, roaa waikawa oxalic. Tātai reira: HOOC-COOH. Ahakoa te meka e pā ana ki ngā waikawa e whakaaro he waikawa kaha organic (3000 wa kaha atu i te waikawa ahetiki): C2O4H2 → C2O4H- + H + (pKa = 1.27) me atu: C2O4H- → C2O42 - + H + (PK = 4.27). e karangatia hākawa me tai o tenei waikawa oxalate. katote oxalate C2O42- ko te kaihoko whakaiti. I roto i te tauhohenga o te waikawa oxalic ki te otinga o te pāhare pāporo (KMnO4) me te whakamutunga ka whakahokia e te riro taekore otinga. Kei te āhuatanga i te reira na roto i te tauhohenga reversible me tauhohe āta rere ki waiwaihā (hākawatanga) rite te hua o nei nga hākawa e hanga e: HOOC-COOH + 2HOR ↔ 2H2O + ROOC-COOR.

I roto i te ahumahi, waikawa oxalic, i whiwhi i te piti hāora o te pūhui matū. Hei tauira, i roto i te aroaro o te vanadium whakakōkī (V2O5) ranunga o te waikawa hauota (HNO3) me te pūngāwhā (H2SO4) waikawa oxidize waiwaihā, glycols me te warowaihā. Hoki tikanga o te ethylene me hāora acetylene tika ki te waikawa hauota (HNO3) i roto i te aroaro o Mariao palladium o PD (NO3) 2 ranei PdCl2. hua waikawa oxalic te i propylene, he wai oxidized nei i te hauota hāora (NO2). He he tukanga anga pai mō te teuteu tauhohenga o te waikawa me te konutai waihā (NaOH) ki te waro haukura (CO) i roto i te atamira takawaenga o hanganga o te konutai formate: NaOH + CO → HCOONa. Na ka tukua te oxalate konutai me te hauwai i hanga te: HCOONa + NaOH → NaOOC-COONa + H2 ↑. O te oxalate konutai i roto i te taiao waikawa whiwhi waikawa oxalic: NaOOC-COONa + 2H + → HOOC-COOH + 2Na +.

tono Main o waikawa oxalic - he horoi WHITENING ranei. Ka taea e tōtika waikawa oxalic tango waikura, na maha tikanga horoi Kei te pūhui matū. Mō te hauwhā o te waikawa oxalic hua whakamahia te rite te waiwhakaū mō te whākano i te hiako, me te pueru ahumahi. taea hoki te whakamahi i te reira i rite te kaiwhakahohe (GOST 22180-76) i roto i te matū tātari. Etandioevaya waikawa dihydrate (HOOC-COOH • H2O) TU 2431-002-77057039-2006 ki te hautanga papatipu o te taonga taketake whakamahia ≥ 99,3% i roto i te tukanga whakaputa o te kōtuitanga organic mo te purenga o te waikura, me te tauine whakarewa mo bleaching he Microscopy sectioning. whakamahi Beekeepers o otinga waikawa oxalic ki te hautanga papatipu o 3.2% i roto i te huka tirikara mō te tohe i te mite pirinoa. Ki runga ki ngā hanganga mapere otinga tona mata tukinotia ki hiritia me ki hoatu ratou glints.

waikawa oxalic me oxalates hakari i roto i ngā tipu maha, tae atu ki tea pango, kua kitea i roto i te kararehe. Ko te kino matua ki te tangata e pā ana te ki täkihi, e puta tika ana ki te pāhekoheko o te waikawa oxalic ki konupūmā, hua i roto i te rerenga o te totoka konupūmā oxalate (SaS2O4) - te wāhanga matua i roto i nga kohatu tākihi. Waikawa whakaoho mamae tahi e tika ana ki te rerenga o taua pūhui i roto ia ratou. Ka taea te hanga e waikawa oxalic i roto i te tinana i te pākia o ethylene e haere mai ana i te taiao (hei tauira, anti-huka te tikanga mo te tukanga i te runways o rererangi me te manureva, me ētahi atu puna tangata-i hanga). Ka taea te wehea raruraru Potential ki oxalate i roto i te tinana tangata ki rua. Tuatahi - konupūmā nui macrocell herea waikawa oxalic me hanga e tona hē i roto i te pūtau o te kopa, i nga okana. Ko te tuarua - te hanganga o kohatu tākihi. Ko te nui rahi o te waikawa oxalic roto i roto i rau kōkihi me kakau o rhubarb, he kopurepure, beets, te pāhiri, scallions.