Reason why the waste alkali in the neutralization tower turns red
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Reason why the waste alkali in the neutralization tower turns red
I ran into the same problem, dark red. A salt solution containing Fe3+ should be brownish-yellow; Fe(SCN)]2+ is involved here, and ferrous cyanide ions are red in color. As for MnO4-, permanganate ions are red only at certain concentrations; they are generally considered to be purplish-red. Which acid are you trying to neutralize?
I ran into the same problem, dark red. A salt solution containing Fe3+ should be brownish-yellow; Fe(SCN)]2+ is involved here, and ferrous cyanide ions are red in color. As for MnO4-, permanganate ions are red only at certain concentrations; they are generally considered to be purplish-red. Which acid are you trying to neutralize?
It is generally believed to contain trivalent iron ions. I have never seen ferrous cyanide. I have seen potassium permanganate in various concentrations, and it is quite easy to distinguish its color from that of ordinary trivalent iron ions.