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\(1.2Fe+3Cl_2\overset{t^o}{--->}2FeCl_3\)
\(2.Zn+S\overset{t^o}{--->}ZnS\)
\(3.4P+5O_2\overset{t^o}{--->}2P_2O_5\)
\(4.Mg+2HCl--->MgCl_2+H_2\)
\(5.CO_2+H_2O--->H_2CO_3\)
\(6.K_2O+H_2O--->2KOH\)
\(7.4Na+O_2--->2Na_2O\)
\(8.Fe_2\left(SO_4\right)_3+3Ca\left(OH\right)_2--->2Fe\left(OH\right)_3\downarrow+3CaSO_4\)
\(9.Al_2O_3+3H_2SO_4--->Al_2\left(SO_4\right)_3+3H_2O\)
1) 2Fe+3Cl2 --to- > 2FeCl3
2)Zn+S --to- > ZnS
3) 4P+5O2 --to- > 2P2O5
4) Mg+ 3HCl ---> MgCl2 + H2
5)CO2+H2O --->H2CO3
6)K2O+H2O ----> 2KOH
7)4Na + O2 --to- > 2Na2O
8)Fe2(SO4)3 + 3Ca(OH)2 ----> 2Fe(OH)3+ 3CaSO4
9. Al2O3 + 3H2SO4 -----> Al2(SO4)3 + 3H2O
biểu diễn phản ứng hóa học trên là
A Fe2(SO4)3 + 6NaOH → 2Fe(OH)3 + 3Na2SO4
B Fe(SO4)2 + NaOH → FeOH + Na(SO4)2
C Fe2(SO4)3 + NaOH → Fe2(OH) + Na(SO4)3
D FeSO4 + 2NaOH → Fe(OH)2 + Na2SO4
\(Fe_2\left(SO_4\right)_3+6NaOH\rightarrow Fe\left(OH\right)_3+3Na_2SO_4\\ \Rightarrow A\)
\(6KOH+Fe_2\left(SO_4\right)_3\rightarrow3K_2SO_4+2Fe\left(OH\right)_3\left(6:1:3:2\right)\)
\(2KNO_3\rightarrow2KNO_2+O_2\left(2:2:1\right)\)
\(2Al+3CuCl_2\rightarrow2AlCl_3+3Cu\left(2:3:2:3\right)\)
\(P_2O_5+3H_2O\rightarrow2H_3PO_4\left(1:3:2\right)\)
\(a,4Na+O_2\xrightarrow{t^o}2Na_2O\\ b,Mg+2HCl\to MgCl_2+H_2\\ c,6NaOH+Fe_2(SO_4)_3\to 3Na_2SO_4+2Fe(OH)_3\downarrow\)
\(a.4Na+O_2-^{t^o}\rightarrow2Na_2O\\ b.Mg+2HCl\rightarrow MgCl_2+H_2\\ c.6NaOH+Fe_2\left(SO_4\right)_3\rightarrow3Na_2SO_4+2Fe\left(OH\right)_3\)
2Cu + O2 -> 2CuO
2Al(OH)3 + 3H2SO4 -> Al2(SO4)3 + 6H2O
2Fe + 3Cl2 -> 2FeCl3
CnH2n + 3n/2O2 -> nCO2 + nH2O
\(a.2Al+3Cl_2\rightarrow2AlCl_3...2:3:2\\ b.Fe_3O_4+2C\rightarrow3Fe+2CO_2...1:2:3:2\\ c.2Fe\left(OH\right)_3+3H_2SO_4\rightarrow Fe_2\left(SO_4\right)_3+6H_2O...2:3:1:6\)
2Fe(OH)3 + 3H2SO4 → Fe2(SO4)3 + 6H2O
\(2Fe\left(OH\right)_3+3H_2SO_4\rightarrow Fe_2\left(SO_4\right)_3+6H_2O\)