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a) 2Zn + O2 => 2ZnO
4Al + 3O2 => 2Al2O3
2Cu + O2 => 2CuO
b) Zn + Cl2 => ZnCl2
2Al+ 3Cl2 => 2AlCl3
Cu + Cl2 => CuCl2
c) Zn + H2SO4 => ZnSO4 + H2 ↑
2Al + 3H2SO4 => Al2(SO4)3 + 3H2 ↑
d) Zn + FeSO4 => Fe + ZnSO4
2Al + 3FeSO4 => Al2(SO4)3 + 3Fe
Bài 1:
H2 + O2 → H2O
N2O5 + H2O → HNO3
Bài 4:
Fe2(SO3)3: Sắt III sunfat
Mg(OH)2: Magie hidroxit
H3PO4: axit photphoric
Ba(HSO4)2: Bari Bisunfat
Bài 1 :
\(a.2H_2+O_2\underrightarrow{^{t^0}}2H_2O\)
\(b.N_2O_5+H_2O\rightarrow2HNO_3\)
Bài 2 :
\(n_{Al}=\dfrac{5.4}{27}=0.2\left(mol\right)\)
\(2Al+3H_2SO_4\rightarrow Al_2\left(SO_4\right)_3+3H_2\)
\(0.2............0.3...........0.1..............0.3\)
\(m_{H_2SO_4}=0.3\cdot98=29.4\left(g\right)\)
\(m_{Al_2\left(SO_4\right)_3}=0.1\cdot342=34.2\left(g\right)\)
\(m_{H_2}=0.3\cdot2=0.6\left(g\right)\)
\(V_{H_2}=0.3\cdot22.4=6.72\left(l\right)\)
\(a)n_{H_2}=\dfrac{6,72}{22,4}=0,3mol\\ 2Al+3H_2SO_4\rightarrow Al_2\left(SO_4\right)_3+3H_2\\ 0,2\leftarrow-0,3\leftarrow-0,1\leftarrow---0,3\)
\(a=m_{Al}=0,2.27=5,4g\\ b)m_{Al_2\left(SO_4\right)_3}=0,1.342=34,2g\\ c)C_{\%H_2SO_4}=\dfrac{0,3.98}{100}\cdot100=29,4\%\)
a)nH2=22,46,72=0,3mol2Al+3H2SO4→Al2(SO4)3+3H20,2←−0,3←−0,1←−−−0,3
\(Pt: 2Al+3H_2SO_4 \rightarrow Al_2(SO_4)_3 + 3H_2\)
\(a.n_{H_2}=\dfrac{6,72}{22,4}=0,3\left(mol\right)\)
Theo pt: \(n_{Al}=\dfrac{2}{3}n_{H_2}=0,2\left(mol\right)\)
\(\Rightarrow m_{Al}=a=0,2.27=5,4\left(g\right)\)
\(b.n_{Al_2\left(SO_4\right)_3}=\dfrac{1}{3}n_{H_2}=0,1\left(mol\right)\)
\(\Rightarrow m_{Al_2\left(SO_4\right)_3}=0,1.342=34,2g\)
\(c.\)Theo pt: \(n_{H_2SO_4}=n_{H_2}=0,3\left(mol\right)\)
\(\Rightarrow m_{H_2SO_4}=0,3.98=29,4g\)
\(C_{\%}H_2SO_4=\dfrac{29,4}{100}.100\%=29,4\%\)
a: \(SO_3+2NaOH\rightarrow Na_2SO_4+H_2O\)
\(HNO_3+NaOH\rightarrow NaNO_3+H_2O\)
\(CuCl_2+2NaOH\rightarrow Cu\left(OH\right)_2\downarrow+2HCl\)
\(\left(NH_4\right)_2SO_4+2NaOH\rightarrow Na_2SO_4+2H_2O+2NH_3\uparrow\)
b: \(SO_3+Ca\left(OH\right)_2\rightarrow CaSO_4+H_2O\)
\(Ca\left(OH\right)_2+2HNO_3\rightarrow Ca\left(NO_3\right)_2+2H_2O\)
\(Ca\left(OH\right)_2+CuCl_2\rightarrow Cu\left(OH\right)_2\downarrow+CaCl_2\)
\(Ca\left(OH\right)_2+\left(NH_4\right)_2SO_4\rightarrow CaSO_4+2NH_3\uparrow+2H_2O\)
a) \(SO_3+2NaOH\rightarrow Na_2SO_4+H_2O\)
\(HNO_3+NaOH\rightarrow NaNO_3+H_2O\)
\(CuCl_2+2NaOH\rightarrow Cu\left(OH\right)_2+2NaCl\)
\(\left(NH_4\right)SO_4+2NaOH\xrightarrow[t^o]{}Na_2SO_4+2NH_3+2H_2O\)
b) \(SO_3+Ca\left(OH\right)_2\rightarrow CaSO_4+H_2O\)
\(2HNO_3+Ca\left(OH\right)_2\rightarrow Ca\left(NO_3\right)_2+2H_2O\)
\(CuCl_2+Ca\left(OH\right)_2\rightarrow Cu\left(OH\right)_2+CaCl_2\)
\(\left(NH_4\right)SO_4+Ca\left(OH\right)_2\underrightarrow{t^o}CaSO_4+2NH_3+2H_2O\)
Em chép nhầm đề ạ, không có Al mà lại ghi thêm vào nên không làm đcNguyễn Trần Thành Đạt
`a) PTPƯ: CuO + H_2 SO_4 -> CuSO_4 + H_2 O`
`b) n_[CuO] = [ 1,6 ] / 80 = 0,02 (mol)`
`n_[H_2 SO_4] = [ 20 / 100 . 100 ] / 98 = 10 / 49 (mol)`
Ta có: `[ 0,02 ] / 1 < [ 10 / 49 ] / 1`
`-> CuO` hết ; `H_2 SO_4` dư
Theo `PTPƯ` có : `n_[H_2 SO_4\text{ p/ư}] = n_[CuO] = n_[CuSO_4] = 0,02 (mol)`
`@ C%_[H_2 SO_4\text{ dư}] = [ 10 / 49 - 0,02 ] / [ 1,6 + 100 ] . 100 ~~ 0,2 %`
`@ C%_[CuSO_4] = [ 0,02 ] / [ 1,6 + 100 ] . 100 ~~ 0,02 %`
Fe + H2SO4 ➝ FeSO4 + H2
BaO + H2SO4 ➝ BaSO4 + H2O
Al2O3 + 3H2SO4 ➝ Al2(SO4)3 + 3H2O
2KOH + H2SO4 ➝ K2SO4 + 2H2O
Fe + CuSO4 ➝ Cu + FeSO4
2KOH + CuSO4 ➝ K2SO4 + Cu(OH)2
a)2Zn+O2--t0->2ZnO
2Al+3O2--t0->2Al2O3
b)Zn+Cl2--t0->ZnCl2
2Al+3Cl2--t0->2AlCl3
c)Zn+H2SO4--->ZnSO4+H2
2Al+3H2SO4--->Al2(SO4)3+3H2
d)2Al+3FeSO4--->Al2(SO4)3+3Fe
Zn+FeSO4--->ZnSO4+Fe
a, 2Zn + O2 -to--> 2ZnO
4 Al + 3O2 --to--> 2Al2O3
2Cu + O2 --to--> 2CuO
b, Zn + Cl2 ---> ZnCl2
2Al +3 Cl2 ---> 2AlCl3
Cu + Cl2 ---> CuCl2
c, Zn + H2SO4 → ZnSO4 + H2
Cu + H2SO4 → CuSO4 + H2
Al+ H2SO4 → Al2(SO4 ) 3+ H2