Xác định các chất
\(A\xrightarrow[\left(1\right)]{+O_2}B\xrightarrow[\left(2\right)]{+O_2,V_2O_5}C\xrightarrow[\left(3\right)]{+H_2O}D\xrightarrow[\left(4\right)]{+Cu}B\xrightarrow[\left(5\right)]{+Ca\left(OH\right)_2}E\xrightarrow[\left(6\right)]{+B}F\xrightarrow[\left(7\right)]{t^o}B\xrightarrow[\left(8\right)]{+G}D\)
A là thành phần chính của quặng pirit sắt
A: FeS2
B: SO2
C: SO3
D: H2SO4
E: CaSO3
F: Ca(HSO3)2
G: Br2
PTHH:
\(\left(1\right)4FeS_2+11O_2\xrightarrow[]{t^o}2Fe_2O_3+8SO_2\uparrow\\ \left(2\right)2SO_2+O_2\xrightarrow[V_2O_5]{t^o}2SO_3\uparrow\\ \left(3\right)SO_3+H_2O\rightarrow H_2SO_4\\ \left(4\right)2H_2SO_{4\left(đặc,nóng\right)}+Cu\rightarrow CuSO_4+SO_2\uparrow+2H_2O\\ \left(5\right)SO_2+Ca\left(OH\right)_2\rightarrow CaSO_3\downarrow+H_2O\\ \left(6\right)CaSO_3+SO_2+H_2O\rightarrow Ca\left(HSO_3\right)_2\)
\(\left(7\right)Ca\left(HSO_3\right)_2\xrightarrow[]{t^o}CaSO_3\downarrow+SO_2\uparrow+H_2O\\ \left(8\right)SO_2+Br_2+2H_2O\rightarrow H_2SO_4+2HBr\uparrow\)
