Составьте уравнение реакции по схемам: 1) S => H2S => Na2S => CuS 2) FeS => H2S => S =>...

Question

Составьте уравнение реакции по схемам:
1) S => H2S => Na2S => CuS
2) FeS => H2S => S => SO2
3) S => SO2 => H2SO3 => PbSO3

Answer 1

1) S => H2S => Na2S => CuS
S+H2⇒H2S↑
H2S+2NaOH⇒Na2S+2H2O
Na2S+CuCl2⇒CuS↓+2NaCl
2) FeS => H2S => S => SO2
FeS↓+2HCl⇒FeCl2+H2S↑
2H2S+SO2⇒3S↓+2H2O
S+O2⇒SO2↑
3) S => SO2 => H2SO3 => PbSO3
S+O2⇒SO2↑
SO2+H2O⇒H2SO3
Pb+H2SO3⇒PbSO3↓+H2