Ответ:
Как-то так:
первое:
1) 2Ca+O2→2CaO
2)CaO+H2O→Ca(OH)2
3)Ca(OH)2+2HCl→CaCl2+2H2O
4)CaO+H2SO4→ CaSO4+H2O
5)Ca(OH)2+H2SO3→CaSO3+2H2O
Второе:
1)S+O2→SO2
2)2SO2+O2→2SO3
3)SO3+H2O→H2SO4
4)H2SO4+2KOH→K2SO4+2H2O
5)4K+O2→2K2O
6)K2O+H2O→2KOH
7)2KOH+H2SO4→K2SO4+2 H2O
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Verified answer
Ответ:
Как-то так:
первое:
1) 2Ca+O2→2CaO
2)CaO+H2O→Ca(OH)2
3)Ca(OH)2+2HCl→CaCl2+2H2O
4)CaO+H2SO4→ CaSO4+H2O
5)Ca(OH)2+H2SO3→CaSO3+2H2O
Второе:
1)S+O2→SO2
2)2SO2+O2→2SO3
3)SO3+H2O→H2SO4
4)H2SO4+2KOH→K2SO4+2H2O
5)4K+O2→2K2O
6)K2O+H2O→2KOH
7)2KOH+H2SO4→K2SO4+2 H2O