\(Zn\underrightarrow{\left(1\right)}ZnO\underrightarrow{\left(2\right)}Zn\underrightarrow{\left(3\right)}H_2\)
(1) \(2Zn+O_2\underrightarrow{t^0}2ZnO\)
\(\left(2\right)ZnO+H_2\rightarrow Zn+H_2O\)
\(\left(3\right)Zn+H_2O\rightarrow ZnO+H_2\)
\(H_2O\underrightarrow{\left(1\right)}O_2\underrightarrow{\left(2\right)}K_2O\underrightarrow{\left(3\right)}KOH\)
\(\left(1\right)2H_2O\underrightarrow{đp}2H_2+O_2\)
\(\left(2\right)4K+O_2\underrightarrow{t^0}2K_2O\)
\(\left(3\right)K_2O+H_2O\rightarrow2KOH\)
a.
\(2Zn+O_2\underrightarrow{t^o}2ZnO\)
\(ZnO+H_2\underrightarrow{t^o}Zn+H_2O\)
Zn + 2HCl \(\rightarrow\) ZnCl2 + H2
b.
\(2H_2O\underrightarrow{điệnphân}2H_2+O_2\)
\(4K+O_2\underrightarrow{t^o}2K_2O\)
K2O + H2O \(\rightarrow\) 2KOH
1.Zn ---> ZnO ---> Zn --->H2
Zn + O2 --to--> ZnO
ZnO + H2O -> Zn + H2O
Zn + 2HCl -> ZnCl2 + H2
2.H2O ---> O2 ---> K2O ---> KOH
2H2O -đp-> 2H2 + O2
O2 + 2K -to-> 2K2O
K2O + H2O -> 2KOH
1) Zn---> ZnO---> Zn---> H2
2Zn+ O2---> 2ZnO
ZnO+ CO---> Zn+ CO2
Zn+ H2SO4---> ZnSO4+ H2
2) H2O---> O2---> K2O---> KOH
2H2O---điện phân---> 2H2+ O2
4K+ O2--to--> 2K2O
K2O+ H2O---> 2KOH
a)
(1) 2Zn + O2 → 2ZnO
(2) ZnO + H2 → Zn + H2O
(3) Zn + 2HCl →ZnCl2 + H2
b)
(1) 2H2O → 2H2 + O2
(2) O2 + 4K → 2K2O
(3)K2O + H2O→2KOH