Nalałem trochę do kolby H2O2 30% i wsypałem troche FeSO4 roztwór zmienił sie na kolor... coca coli Kolba była gorąca i było trochę dymu miał słaby zapach tlneków siarki kotłowało się tak z 5 minut. Co to jest? Po reakcji kolor roztworu jest pomarańcowy. Nadtlenek żelaza ?[/i]

Ja myślę, że FeSO4 utlenił się do Fe2(SO4)3

A moze Fe(OH)3 + SO3 ?

osoad Fe(OH)3 ma wlasnie kolor brazowy

// edyta

tyle ze Fe(OH3) jest nie rozpuszczalny w wodzie
wiec chyba jednak opcja w poscie powyzej

wiesz sulik twoja teoria i tak sprowadza sie do tego samego gdyż So3 regując z wodą na H2SO4 a to zareaguje z Fe(OH)3 i da Fe2(SO4)3 wiec.......

Jak dużo się wsypie FeSO4 to pojawia się tyle ? tlenu ? jak z nadmanganianu potasu

Tlenu? Jeśli już, to tylko z rozkładu nadmiaru H2O2

Mógłby ktoś w skrócie powiedzieć o tym?
Canine lingual arteries are innervated by calcitonin gene-related peptide (CGRP)-containing vasodilator nerves. Although the vascular system might be considered as the first target of oxygen-derived free radicals in some of the pathophysiological conditions, the effect of oxygen-derived free radicals on neurotransmission in CGRP nerves remains unknown. We, therefore, investigated the role of oxygen-derived free radicals generated from Fenton's reagent (3 x 10(-4) M H2O2 plus 2 x 10(-4) M FeSO4) on CGRP-mediated neurogenic relaxation of canine lingual artery ring preparations. In all experiments, endothelium-denuded preparations (which were suspended in the tissue bath for isometric tension recordings) were treated with guanethidine (5 x 10(-6) M) to block neurogenic constrictor responses. The periarterial nerve stimulation (10 V, 4-16 Hz, for 45 sec), exogenous CGRP (10(-8) M) or the ATP-sensitive K+ channel opener cromakalim (10(-6) M) produced relaxation of the rings at a stable plateau tension by the addition of norepinephrine (10(-5) M); the relaxations elicited by CGRP and cromakalim were human CGRP-(8-37)- and glibenclamide-abolishable, respectively. When the nerve stimulation, CGRP and cromakalim were given after H2O2/FeSO4 exposure (Fenton's reagent was removed from the tissue bath), the observed relaxations were markedly diminished. The effects afforded by the early exposure to H2O2/FeSO4 reaction of the preparations were significantly protected by catalase (100 U/ml, H2O2 scavenger), dimethylthiourea (1 mM, H2O2 and HO. scavenger), dimethyl sulfoxide (100 mM, HO. scavenger), deferoxamine (1 mM, a powerful iron chelator) and by a cocktail of catalase-deferoxamine. Generation of HO. from H2O2/FeSO4 was studied by electron spin resonance spectroscopy using the spintrap 5,5-dimethyl-1-pyrroline-N-oxide. We found that H2O2/ FeSO4 reaction formed a 1:2:2:1 quartet, characteristic of the HO-5,5-dimethyl-1-pyrroline-N-oxide spin adduct. After exposure to capsaicin (10(-5) M) or H2O2/FeSO4 of the artery ring preparations, the intensity of CGRP-like immunoreactivity of the periarterial nerves was reduced drastically; the relaxation caused by the nerve stimulation was nearly fully inhibited by capsaicin and H2O2/FeSO4 reaction. The relaxant response, however, to nitroglycerin (10(-5) M) in the presence of norepinephrine to induce tone was unaffected by the early H2O2/ FeSO4 exposure. The data obtained from the present study indicate that HO., rather than H2O2, is the active agent in CGRP-mediated neurogenic relaxation. It is suggested that the HO. can deplete endogenous CGRP localized prejunctionally and also damage CGRP-induced relaxation of canine lingual artery preparations that is caused by activation of ATP-sensitive K+ channels at postjunctional sites. It is also postulated that the second messenger system of the relaxation mediated, at least, by cyclic GMP may be less susceptible to HO..

związki żelaza katalizują rozpad H2O2, stąd to kotłowanie, ale żelazo (II) jest te ż utleniane do Fe(III)

Kiedyś na części praktycznej pewnego konkursu chemicznego zmieszałem perhydrol z Roztworem FeCl2 i efekt był podobny jak opisany powyżej, tyle tylko, że mieszanina wykipiała z probówki i zalała kartkę na której mieliśmy zapisywać reakcje...