Hòa tan hoàn toàn 23,76 gam hỗn hợp X chứa FeO, Fe...

D

- Hướng dẫn giải

\(23,76\left\{ \begin{array}{l}Fe:\\O:a\\C{O_2}:0,06\end{array} \right. \to 48,32\left\{ \begin{array}{l}Fe\\SO_4^{2 - }:a\end{array} \right.\)

\(\begin{array}{l} \to 23,76 - 16a - 0,06.44 = 48,32 - 96a \to a = 0,34\\ \to \left\{ \begin{array}{l}Fe:15,68\,\,(gam)\\OH:0,34.2\\BaS{O_4}:0,34\end{array} \right. \to {m_ \downarrow } = 106,46\end{array}\)