Acid oxalic

Reserve diacid carboxylic ma C2H2O4 atoa fuafaatatau valaauina e acid ethanedioic nomenclature faiga. O lenei lotoa ua lauiloa foi i le igoa isi taatele - acid oxalic. Sa muamua maua i le kemisi Siamani F. Wohler o cyanogen (oxalic dinitrile acid) i le 1824. taʻega tioata Colorless o le acid faataapeina i le vai e fai ai fofo colorless. o le mamafa gao 90,04 g / mol. I foliga tutusa taʻega tioata colorless monoclinic. I le 20 ° C i le 100 g vai na faataapeina 8 g o acid oxalic. Soluble i acetone, ethanol ma le Eteru ethyl. Density 1,36 g / cm³. Melts i 189,5 ° C, sublimes i le 125 ° C, decomposes i 100-130 ° C.

meatotino vailaau uma uiga o le acids carboxylic, acid oxalic umia. Fua Faatatau ai: HOOC-COOH. E ui lava i le mea moni e faapea e faatatau i acids carboxylic ua manatu a acid faatulagaina malosi (3000 taimi malosi atu nai lo acid acetic): C2O4H2 → C2O4H- + H + (pKa = 1.27) ma isi: C2O4H- → C2O42 - + H + (pK = 4.27). ua valaauina esters ma masima o lenei acid oxalate. Ion oxalate C2O42- o se sui sooupu faaitiitia. I le tali mai a le acid oxalic i se fofo o permanganate potassium (KMnO4) ma le gata ua toe fofo avea colorless. O loo faamatalaina i le feliuai tali ma lemu tali tafe i alcohols (esterification) o se taunuuga o lea ua faia le esters: HOOC-COOH + 2HOR ↔ 2H2O + ROOC-COOR.

I alamanuia, acid oxalic, maua e oxidation o le tuufaatasi vailaau. Mo se faataitaiga, i le afioaga o se vaega taua vanadium (V2O5) tuufaatasiga o acid nitric (HNO3) ma sulfuric (H2SO4) acids oxidize alcohols, glycols ma carbohydrates. Foi metotia talafeagai o ethylene ma oxidation acetylene ma acid nitric (HNO3) i le afioaga o le palladium masima o Pd (NO3) 2 po o PdCl2. ua tuuina acid Oxalic mai propylene, o se suavai ua oxidized e karaponi nitrogen (NO2). O loo i ai se faagasologa o le faamoemoe lelei mo le sauniaina o uiga faaalia o le acid ma hydroxide sodium (NaOH) ma monoxide carbon (CO) e ala i le tulaga le tumau o le faavaega o formate sodium: NaOH + CO → HCOONa. Ona ua tatala oxalate ma hydrogen le sodium faia: HCOONa + NaOH → NaOOC-COONa + H2 ↑. O le oxalate sodium i se siosiomaga acidic maua acid oxalic: NaOOC-COONa + 2H + → HOOC-COOH + 2Na +.

talosaga autu o acid oxalic - a le faamamaina po o whitening. mafai ai ona aoga acid Oxalic aveesea ele, le tele o auala o le faamamaina e aofia ai se lotoa vailaau. E tusa o le kuata o le acid oxalic gaosia ua faaaogaina o se mordant mo dyeing le alamanuia paʻu ma lavalava. E mafai foi ona faaaoga e avea o se reagent (GOST 22180-76) i le kemisi analytical. dihydrate acid Etandioevaya (HOOC-COOH • H2O) Tu 2431-002-77057039-2006 ma se vaega vaega tele o le mea faavae ≥ 99,3% o loo faaaogaina i le faagasologa tuuina atu o le tuufaatasia faatulagaina mo le faamamāina o uamea ele ma fua mo bleaching a microscopy sectioning. Beekeepers faaaogaina o fofo acid oxalic ma se vaega vaega tele o le 3.2% i le sua totoʻo suka mo le tetee a tupe iti parasitic. I le maeʻa fausaga maamora faia o le fogaeleele e faamauina ma tuuina atu i latou glints.

acid Oxalic ma le taimi nei oxalates i le tele o laau, e aofia ai le lauti uliuli, o loo maua i manu. O le faaleagaina autu i tagata o loo fesootai ma le toilalo Fatugao, lea e tulai mai ona o le fegalegaleaiga o acid oxalic ma kalisiu, e mafua i le precipitation o mautu oxalate kalisiu (SaS2O4) - o le vaega autu i maa fatugao. faaosoosoina oʻona tiga soofaatasi ona precipitation o ia tuufaatasi i latou. e mafai ona faia acid Oxalic i le tino e metabolism o ethylene afio mai mai le siosiomaga (f.t.t., aneti-icing o lona uiga mo ona iloilo le runways o le malae vaalele ma vaalele, faapea foi ma isi punaoa e faia e tagata). e mafai ona vaevaeina faafitauli Gafatia ma oxalate i le tino o le tagata i totonu o le lua. Muamua - taua kalisiu macrocell noatia acid oxalic ma ua faia e lona faaletonu i totonu o le sela o le aano o le tino ma totoga. O le lona lua - o le faavaega o maa fatugao. O le aofaiga e sili o acid oxalic loo i ai i lau sipinasi ma mafua o rhubarb, sorrel, Beets, pasili, scallions.