hoàn thành các pư sau
a) HCl + ? --> ? + H2O
b) ? + NaOH --> Fe(OH)3 + ?
c) ? + ? --> NaCl2 + H2O
d) BaCl2 + ? --> ? + FeCl3
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![](https://rs.olm.vn/images/avt/0.png?1311)
a)\(2HCl + MgO \rightarrow MgCl_2 + H_2O\)
b)\(FeCl_3 + 3NaOH \rightarrow Fe(OH)_3 + 3NaCl\)
c)\(Na_2CO_3 + 2HCl \rightarrow 2NaCl + CO_2 + H_2O\)
d)\(3BaCl_2 + Fe_2(SO_4)_3 \rightarrow 2FeCl_3 + 3BaSO_4\)
![](https://rs.olm.vn/images/avt/0.png?1311)
Fe + O2 = Fe3O4
Fe3O4 + HCl = FeCl2 + FeCl3 + H2O
FeCl2 + NaOH = Fe(OH)2 + NaCl
FeCl3 + NaOH = Fe(OH)3 + NaCl
Fe(OH)2 + O2 + H2O = Fe(OH)3
Fe(OH)3 = Fe2O3 + H2O
=> A=Fe3O4;B=FeCl2;C=FeCl3;D=Fe(OH)2;E;Fe(OH)3;G=NaCl;F=Fe2O3
![](https://rs.olm.vn/images/avt/0.png?1311)
BaO+H2O--->Ba(OH)2
SO2+Ba(OH)2--->BaSO3+H2O
H2SO4+BaCl2--->BaSO4+2HCl
Al2O3+6HCl--->2AlCl3+3H2O
Fe+2HCl--->FeCl2+H2
6NaOH+Al2(SO4)3--->2Al(OH)3+3Na2SO4
BaO+CO2--->BaCO3
Fe(OH)3+3HCl--->FeCl3+3H2O
Mg(OH)2--->MgO+H2O
Fe3O4+8HCl--->FeCl2+2FeCl3+4H2O
2Al(OH)3+3H2SO4--->Al2(SO4)3+6H2O
2Al(OH)3--->Al2O3+3H2O
2NaOH+CO2--->Na2CO3+H2O
Na2CO3+2HCl--->2NaCl+CO2+H2O
Na2SO4+BaCl2--->BaSO4+2NaCl
CaCO3--->CaO+CO2
2NaOH+2Al+2H2O--->2NaAlO2+3H2
NaCl+AgNO3--->AgCl+NaNO3
2NaOH+Al2O3--->2NaAlO2+H2O
Fe+2AgNO3--->Fe(NO3)2+2Ag
(NH4)2SO4+2NaOH--->Na2SO4+2NH3+2H2O
Al(OH)3+NaOH--->NaAlO2+2H2O
2NaOH+Zn(OH)2--->Na2ZnO2+2H2O
Na2SO3+2HCl--->2NaCl+SO2+H2O
cac bạn ơi dấu bằng ong rồi cách ra làm cái khác nhé ình viết sai
chỉ có phần chất tham gia phản ứng thôi
![](https://rs.olm.vn/images/avt/0.png?1311)
Dung dịch \(H_2SO_4\) tác dụng hết với các chất \(B.CuO,NaOH,BaCl_2,Fe\)
\(PTHH:\\ CuO+H_2SO_4\rightarrow CuSO_4+H_2O\\ 2NaOH+H_2SO_4\rightarrow Na_2SO_4+2H_2O\\BaCl_2+H_2SO_4\rightarrow BaSO_4\downarrow+2HCl\\ Fe+H_2SO_4\rightarrow FeSO_4+H_2\uparrow\)
![](https://rs.olm.vn/images/avt/0.png?1311)
Câu 2 :
$a) K_2O + H_2O \to 2KOH$
$2KOH + H_2SO_4 \to K_2SO_4 + 2H_2O$
$K_2SO_4 + Ba(OH)_2 \to BaSO_4 + 2KOH$
$2KOH + CO_2 \to K_2CO_3 + H_2O$
$b) Mg + 2HCl \to MgCl_2 + H_2$
$MgCl_2 + 2KOH \to Mg(OH)_2 + 2KCl$
$Mg(OH)_2 + H_2SO_4 \to MgSO_4 + 2H_2O$
$MgSO_4 + BaCl_2 \to BaSO_4 + MgCl_2$
$c) SO_2 + 2NaOH \to Na_2SO_3 + H_2O$
$Na_2SO_3 + 2HCl \to 2NaCl + SO_2 + H_2O$
$NaCl + AgNO_3 \to AgCl + NaNO_3$
Câu 3 :
$a) CaO + H_2O \to Ca(OH)_2$
b)
Theo PTHH : $n_{Ca(OH)_2} = n_{CaO} = \dfrac{91,8}{56} = 1,64(mol)$
$\Rightarrow C_{M_{Ca(OH)_2}} = \dfrac{1,64}{0,4} = 4,1M$
c)
$Ca(OH)_2 + 2HCl \to CaCl_2 + 2H_2O$
$n_{HCl} = 2n_{Ca(OH)_2} = 3,28(mol) \Rightarrow m_{dd\ HCl} = \dfrac{3,28.36,5}{20\%} = 598,6(gam)$
![](https://rs.olm.vn/images/avt/0.png?1311)
a) 2Al + 3Cl2 ---> 2AlCl3
b) Fe2O3 + 3H2 ---> 2Fe + 3H2O
c) 4P + 5O2 ---. 2P2O5
d) 2Al(OH)3 ---> Al2O3 + 3H2O
e) (NH4)2CO3 + 2NaOH ---> 2Na2CO3 + NH3 + 2H2O
f) Fe + HCl ---> FeCl2 + O2 (đề sai)
g) 2KClO3 ----> 2KCl + 3O2
h) 3NaOH + FeCl3 ----> Fe(OH)3 + 3NaCl
i) ZnO + 2HCl ----> ZnCl2 + H2O
k) 2K + 2H2O ----> 2KOH + H2
m) 2Na + 2H2O ----> 2NaOH + H2
n) BaCl2 + H2SO4 -----> BaSO4 + 2HCl
o) Na2O + H2O ---> 2NaOH
a) 2Al + 3Cl2 → 2AlCl3
b) 2Fe2O3 + 6H2 → 4Fe + 6H2O
c)4P +5O2 → 2P2O5
d) 2Al(OH)3 → Al2O3 + 3H2O
e) \(\left(NH_4\right)_2CO_3+2NaOH\rightarrow Na_2CO_3+2NH_3+2H_2O\)
f) Fe + 2HCl → FeCl2 + H2
g) 2KClO3 → 2KCl + 3O2
h) 3NaOH + FeCl3 → Fe(OH)3 + 3NaCl
i) ZnO + 2HCl → ZnCl2 + H2O
k) 2K + 2H2O → 2KOH + H2
m) 2Na + 2H2O → 2NaOH + H2
n) BaCl2 + H2SO4 → BaSO4 + 2HCl
o) Na2O + H2O → 2NaOH
![](https://rs.olm.vn/images/avt/0.png?1311)
\(a.Fe_3O_4+8HCl\rightarrow FeCl_2+2FeCl_3+4H_2O\\ b.NaOH+Al+H_2O\rightarrow NaAlO_2+\dfrac{3}{2}H_2\\ c.2M+6H_2SO_4\rightarrow M_2\left(SO_4\right)_3+3SO_2+6H_2O\\ d.2C_xH_y+\dfrac{4x+y}{2}O_2\rightarrow2xCO_2+yH_2O\)
a) \(Fe_3O_4+8HCl\rightarrow FeCl_2+2FeCl_3+4H_2O\)
b) \(2NaOH+2Al+2H_2O\rightarrow2NaAlO_2+3H_2\)
c) \(2M+6H_2SO_4\rightarrow M_2\left(SO_4\right)_3+3SO_2+6H_2O\)
d) \(2C_xH_y+\dfrac{4x+y}{2}O_2\underrightarrow{t^o}2xCO_2+yH_2O\)
![](https://rs.olm.vn/images/avt/0.png?1311)
Câu b sai
Sửa lại là \(Fe+2HCl\rightarrow FeCl_2+H_2\)
Câu c sai
Sửa lại là\(CaO+H_2O\rightarrow Ca\left(OH\right)_2\)
câu d sai
Sửa lại là \(Mg\left(OH\right)_2+HCl\rightarrow MgCl_2+2H_2O\)
a.\(HCl+CaO\rightarrow CaCl_2+H_2O\)
b.\(FeCl_3+NaOH\rightarrow Fe\left(OH\right)_3+NaCl\)
c.\(HCl+NaO\rightarrow NaCl+H_2O\)
d.\(BaCl_2+Fe_2\left(SO_4\right)_3\rightarrow BaSO_4+FeCl_3\)