Решите цепочку превращений.
H2S → x →K2SO3 → CaSO3
H2S → X → K2SO3 → CaSO3
1)2H2S+3O2=2H2SO3 H2SO3+2KCl=K2SO3+2HCl K2SO3+CaCl2=CaSO3+2KCl
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H2S → X → K2SO3 → CaSO3
1)2H2S+3O2=2H2SO3
H2SO3+2KCl=K2SO3+2HCl
K2SO3+CaCl2=CaSO3+2KCl