hoàn thành các PTHH sau:
1.K +?->K2S
2.Fe3O4+ ?->AL2O3 +Fe
3.Cu +AgNO3->?+ Ag
4.NaOH +FeCl2->?+ NaCl
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1) \(2K+S\xrightarrow[]{t^o}K_2S\)
Tỉ lệ 2 : 1 : 1
2) \(3Fe_3O_4+8Al\rightarrow4Al_2O_3+9Fe\)
Tỉ lệ 3 : 8 : 4 : 9
3) \(Cu+2AgNO_3\rightarrow Cu\left(NO_3\right)_2+2Ag\)
Tỉ lệ 1 : 2 : 1 : 2
4) \(2NaOH+FeCl_2\rightarrow2NaCl+Fe\left(OH\right)_2\downarrow\)
Tỉ lệ 2 : 1 : 2 :1
2K+ S--to---> K2S
3Fe3O4+ 8Al------> 4Al2O3+ 9Fe
2Na+ Cl2-----> 2NaCl
NaOH+ FeCl2-----> Fe( OH)2+ NaCl
1. 2K + S -to-> K2S
2. 3Fe3O4 + 8Al --> 4Al2O3 + 12Fe
3. 2Na + Cl2 --to--> 2NaCl
4. Cu + 2AgNO3 --> Cu(NO3)2 + 2Ag
5. 2NaOH + FeCl2 --> 2NaCl + Fe(OH)2
Sửa đề :
1.K+ ? -> K2S
2. Fe3O4+ ? -> Al2O3 +Fe
3. Na + Cl2 -> ?
4. Cu+ AgNO3 -> ?+Ag
5. NaOH+FeCl2 -> ?+?
BÀI LÀM :
\(1,2K+S\underrightarrow{t^0}K_2S\)
\(2,3Fe_3O_4+8Al\underrightarrow{t^0}4Al_2O_3+9Fe\)
\(3,2Na+Cl_2\underrightarrow{t^0}2NaCl\)
\(4,Cu+2AgNO_3\rightarrow Cu\left(NO_3\right)_2+2Ag\)
\(5,2NaOH+FeCl_2\rightarrow2NaCl+Fe\left(OH\right)_2\)
\(a,HCl+Al\left(NO_3\right)_3:Khộng.phản.ứng\\ c,NaCl+H_2SO_{4\left(loãng\right)}:Không.phản.ứng\\ b,SiO_2+4HF\rightarrow SiF_4+2H_2O\\ d,MgCO_3+2HCl\rightarrow MgCl_2+CO_2+H_2O\\ e,3Cl_2+6KOH_{dung.dịch}\rightarrow\left(đ,t^o\right)5KCl+KClO_3+3H_2O\\ g,2Cl_2+2Ba\left(OH\right)_{2\left(dung.dịch\right)}\rightarrow\left(đ,t^o\right)BaCl_2+Ba\left(ClO\right)_2+2H_2O\\ h,2KMnO_4+16HCl\rightarrow\left(đ,t^o\right)2KCl+2MnCl_2+5Cl_2+8H_2O\\ i,SiO_2+HCl:Không.p.ứ\\ k,Fe_3O_4+8HCl\rightarrow2FeCl_3+FeCl_2+4H_2O\\ l,2FeCl_2+Cl_2\rightarrow2FeCl_3\\ c,FeCl_2+H_2SO_{4\left(loãng\right)}:Không.p.ứ\\ m,MnO_2+4HCl\rightarrow\left(đ,t^o\right)MnCl_2+Cl_2+2H_2O\)
\(x,KHCO_3+HCl\rightarrow KCl+CO_2+H_2O\\ y,2Fe+3Br_2\rightarrow2FeBr_3\\ z,4HBr_{đ,n}+MnO_2\rightarrow MnBr_2+Br_2+2H_2O\)
a)HCl + Al(NO3)3 (không phản ứng)
b) SiO2+ 4HF -> SiF4 + 2H2O
c) NaCl + H2SO4 loãng (không phản ứng)
d) MgCO3 + 2HCl -> MgCl2 + CO2 + H2O
f) 3Cl2 + 6KOH ( dung dịch) \(\underrightarrow{t^o}\) 5KCl + KClO3 + 3H2O
g) 2Cl2 + 2Ba(OH)2 ( dung dịch) -> BaCl2 + Ba(ClO)2 + 2H2O
h) 2KMnO4 + 16HCl -> 2KCl + 2MnCl2 + 5Cl2 + 8H2O
i) SiO2+ 4HCl -> SiCl4 + 2H2O
k) Fe3O4+ 8HCl \(\underrightarrow{t^o}\) 2FeCl3 + FeCl2 + 4H2O
l) 2FeCl2 + Cl2 -> 2FeCl3
n) FeCl2 + H2SO4 loãng (không phản ứng)
m) MnO2 + 4HCl \(\underrightarrow{t^o}\) MnCl2 + Cl2 + 2H2O
x) KHCO3 + HCl -> KCl + CO2 + H2O
y) 2Fe + 3Br2 --(đun sôi)--> 2FeBr3
z) 4HBr + MnO2 -> MnBr2 + Br2 + 2H2O
Bài 6:
a, \(NaCl+AgNO_3\rightarrow NaNO_3+AgCl_{\downarrow}\)
b, Không pư.
c, \(Fe+CuCl_2\rightarrow FeCl_2+Cu\)
d, \(BaCl_2+H_2SO_4\rightarrow2HCl+BaSO_{4\downarrow}\)
e, Không pư.
g, \(BaCO_3+2HCl\rightarrow BaCl_2+H_2O+CO_2\)
h, \(CaSO_3+H_2SO_4\rightarrow CaSO_{4\left(ittan\right)}+H_2O+SO_2\)
i, \(FeCl_2+Ba\left(OH\right)_2\underrightarrow{khongcokk}BaCl_2+Fe\left(OH\right)_{2\downarrow}\)
k, \(Na+H_2O\rightarrow NaOH+\dfrac{1}{2}H_2\)
\(2NaOH+FeCl_2\underrightarrow{khongcokk}2NaCl+Fe\left(OH\right)_{2\downarrow}\)
l, \(3Zn+2FeCl_3\rightarrow3ZnCl_2+2Fe\)
l, Không pư.
m, Không pư.
Bạn tham khảo nhé!
$Na_2S + 2HCl \to H_2S + 2NaCl$
$2KOH + H_2SO_4 \to K_2SO_4 + 2H_2O$
$Ba(NO_3)_2 + H_2SO_4 \to BaSO_4 + 2HNO_3$
$NaOH + HCl \to NaCl + H_2O$
$MgSO_4 + Ba(NO_3)_2 \to BaSO_4 + Mg(NO_3)_2$
$AgNO_3 + HCl \to AgCl + HNO_3$
Na2S+2HCl→H2S+2NaClNa2S+2HCl→H2S+2NaCl
2KOH+H2SO4→K2SO4+2H2O2KOH+H2SO4→K2SO4+2H2O
Ba(NO3)2+H2SO4→BaSO4+2HNO3Ba(NO3)2+H2SO4→BaSO4+2HNO3
NaOH+HCl→NaCl+H2ONaOH+HCl→NaCl+H2O
MgSO4+Ba(NO3)2→BaSO4+Mg(NO3)2MgSO4+Ba(NO3)2→BaSO4+Mg(NO3)2
AgNO3+HCl→AgCl+HNO3
\(Fe+S\underrightarrow{t^o}FeS\)
\(2Fe+3Cl_2\underrightarrow{t^o}2FeCl_3\)
\(2Cu+O_2\underrightarrow{t^o}2CuO\)
\(Mg+CuSO_4\rightarrow MgSO_4+Cu\downarrow\)
\(Ag+FeCl_2\rightarrow X\)
\(Al_2O_3+3H_2SO_4\rightarrow Al_2\left(SO_4\right)_3+3H_2O\)
\(Mg+2HCl\rightarrow MgCl_2+H_2\uparrow\)
a, \(MgO+H_2SO_4\rightarrow MgSO_4+H_2O\)
b, \(SO_3+H_2O\rightarrow H_2SO_4\)
c, \(Cu+2H_2SO_{4\left(đ\right)}\underrightarrow{t^o}CuSO_4+SO_2+2H_2O\)
d, \(CaO+CO_2\rightarrow CaCO_3\)
e, \(2NaCl+2H_2O\xrightarrow[cmn]{đpdd}2NaOH+Cl_2+H_2\)
a) \(MgO+H_2SO_4->MgSO_4+H_2\)
b)\(SO_3+H_2O->H_2SO_4\)
c)\(Cu+2H_2SO_4\underrightarrow{t^o}>CuSO_4+SO_2+2H_2O\)
d)\(CaO+CO_2->CaCO_3\)
e)\(2NaCl+2H_2O->2NaOH+Cl_2+H_2\)
\(2K+S\xrightarrow[]{t^o}K_2S\)
\(3Fe_3O_4+8Al\xrightarrow[]{t^o}9Fe+4Al_2O_3\)
\(Cu+2AgNO_3\rightarrow Cu\left(NO_3\right)_2+2Ag\)
\(2NaOH+FeCl_2\rightarrow2NaCl+Fe\left(OH\right)_2\downarrow\)