a)

(1) \(Cu+2H2SO4\left(đ\right)-^{t0}->CuSO4+SO2\uparrow+2H2O\)

\(\left(2\right)CuSO4+BaCl2->CuCl2+BaSO4\downarrow\)

(3) \(CuCl2+2AgNO3->Cu\left(NO3\right)2+2AgCl\downarrow\)

(4) \(Cu\left(NO3\right)2+2NaOH->Cu\left(OH\right)2\downarrow+2NaNO3\)

(5) \(Cu\left(OH\right)2-^{t0}->CuO+H2O\)

(6) \(CuO+2HCl->CuCl2+H2O\)

(7) \(CuCl2-^{t0}->Cu+Cl2\uparrow\)

(8) \(Cu+Cl2-^{t0}->CuCl2\)

(9) \(CuCl2+2NaOh->Cu\left(OH\right)2\downarrow+2NaCl\)

b)

\(4Na+O2-^{t0}->2Na2O\)

\(Na2O+H2O->2NaOH\)

\(2NaOH+CO2->Na2CO3+H2O\)

\(Na2CO3+H2SO4->Na2SO4+CO2\uparrow+H2O\)

\(Na2SO4+BaCl2->2NaCl+BaSO4\downarrow\)

\(2NaCl+2H2O-\xrightarrow[có-màng-ngăn]{đpdd}2NaOH+Cl2\uparrow+H2\uparrow\)

\(3NaOH+H3PO4->Na3PO4+3H2O\)

\(\left(1\right)CuO+2HCl\rightarrow CuCl_2+H_2O\\ \left(2\right)CuCl_2+2KOH\rightarrow Cu\left(OH\right)_2\downarrow+2KCl\\ \left(3\right)Cu\left(OH\right)_2\rightarrow\left(t^o\right)CuO+H_2O\\ \left(4\right)CuO+H_2SO_4\rightarrow CuSO_4+H_2O\)

CuSO₄ + BaCl₂ → CuCl₂ + BaSO₄↓

CuCl₂ + 2NaOH → 2NaCl + Cu(OH)₂↓

Cu(OH)₂ \(\underrightarrow{to}\) CuO + H₂O

CuO + 2HNO₃ → Cu(NO₃)₂ + H₂O

a) 

(1) \(2Al+3FeCl_2\rightarrow2AlCl_3+3Fe\)

(2) \(2Fe+3Cl_2\underrightarrow{t^o}2FeCl_3\)

(3) \(FeCl_3+3NaOH\rightarrow Fe\left(OH\right)_3\downarrow+3NaCl\)

(4) \(2Fe\left(OH\right)_3\underrightarrow{t^o}Fe_2O_3+3H_2O\)

b) 

(1) \(2Cu+O_2\underrightarrow{t^o}2CuO\)

(2) \(CuO+2HCl\rightarrow CuCl_2+H_2O\)

(3) \(CuCl_2+2AgNO_3\rightarrow Cu\left(NO_3\right)_2+2AgCl\downarrow\)

(4) \(Cu\left(NO_3\right)_2+2NaOH\rightarrow Cu\left(OH\right)_2\downarrow+2NaNO_3\)

(5) \(Cu\left(OH\right)_2\underrightarrow{t^o}CuO+H_2O\)

(6) \(CuO+H_2\underrightarrow{t^o}Cu+H_2O\)

\(\left(1\right)CuO+2HCl\rightarrow CuCl_2+H_2O\\ \left(2\right)CuCl_2+2KOH\rightarrow Cu\left(OH\right)_2\downarrow+KCl\\ \left(3\right)Cu\left(OH\right)_2+H_2SO_4\rightarrow CuSO_4+2H_2O\\ \left(4\right)CuSO_4+BaCl_2\rightarrow CuCl_2+BaSO_4\downarrow\)

a.

2Al2O3 \(\underrightarrow{t^o}\)4Al + 3O2\(\uparrow\)

Al + 6HNO3 \(\rightarrow\) Al(NO3)3\(\downarrow\) + 3NO2 + 3H2O

Al(NO3)3 + NaOH \(\rightarrow\) Al(OH)3\(\downarrow\) + NaNO3

2Al(OH)3 \(\xrightarrow[criolit]{đpnc}\) Al2O3 + 3H2O

Al2O3 + 3H2SO4 \(\rightarrow\) Al2(SO4)3 + 3H2O

Al2(SO4)3 + 3BaCl2 \(\rightarrow\) 3BaSO4\(\downarrow\) + 2AlCl3

2AlCl3 \(\xrightarrow[criolit]{đpnc}\) 2Al + 3Cl2\(\uparrow\)

2Al + 3CuSO4 \(\rightarrow\) 3Cu + Al2(SO4)3

C.

\(CuO+H_2SO_4\rightarrow CuSO_4+H_2O\\ CuSO_4+Ba\left(NO_3\right)_2\rightarrow BaSO_4+Cu\left(NO_3\right)_2\\ Cu\left(NO_3\right)_2+2KOH\rightarrow Cu\left(OH\right)_2+2KNO_3\\ Cu\left(OH\right)_2\rightarrow\left(t^o\right)CuO+H_2O\\ CuO+2HCl\rightarrow CuCl_2+H_2O\\ CuCl_2\rightarrow\left(t^o\right)Cu+Cl_2\)

PTHH:

Cu + H₂SO₄ → H₂ + CuSO₄

CuSO₄ + BaCl₂ → BaSO₄ + CuCl₂

CuCl₂ + Ba(OH)₂ → BaCl₂ + Cu(OH)₂

Cu(OH)₂ \(\underrightarrow{t^0}\) H₂O + CuO

2CuO \(\underrightarrow{t^0}\) 2Cu + O₂

Cu + H2SO4(ĐẶC NÓNG) -\(t^O\)> CuSO4 + 2H2O + SO2

CuSO4 + BACL2 -> CuCL2 + BASO4

CuCL2 + Pb(OH)2 -> Cu(OH)2 + PbCL2

Cu(OH)2 -\(t^O\)> CuO + H2O

CuO + H2 -\(t^O\)> Cu + H2O

Cu +2 H2SO4 -->_{nhiệt độ} CuSO4 + 2H2O + SO2

CuSO4 +BaCl2 --> BaSO4 +,CuCl2

CuCl2 +2NaOH ---> Cu(OH)2 + 2NaCl

Cu(OH)2 ---> _{nhiệt độ} CuO + H2O

CuO + H2 --->_{nhiệt độ} Cu + H2O