Question

S--SO2--H2SO3--Na2SO3--H2SO3--K2SO3

Answer 1

 1)S+O2=SO2

2)SO2+H2O=H2SO3

3)H2SO3+2NaOH=Na2SO3+2H2O

4)тут не знаю

5)H2SO3+K2O=K2SO3+H2O

 

Answer 2

S + O2 = SO2

SO2 + H2O = H2SO3

H2SO3 + 2NaOH = Na2SO3 + 2H2O

Na2SO3+H2O=H2SO3+NaOH

К2О + H2SО3=K2SО3+H2О