Cho sơ đồ pư sau
A \(\underrightarrow{HCl}\) B \(\underrightarrow{NaOH}\) D \(\underrightarrow{t^o}\) CuO
A là: A. Cu B. CuO C. Cu(OH)2 D. CuSO4
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a
\(CuO+H_2SO_4\rightarrow CuSO_4+H_2O\\ CuSO_4+2NaOH\rightarrow Cu\left(OH\right)_2+Na_2SO_4\)
b
\(Mg+Cl_2\underrightarrow{t^o}MgCl_2\)
\(MgCl_2+2NaOH\rightarrow Mg\left(OH\right)_2+2NaCl\)
c
\(2NaOH+H_2SO_4\rightarrow Na_2SO_4+2H_2O\)
\(Na_2SO_4+BaCl_2\rightarrow BaSO_4+2NaCl\)
d
\(K_2CO_3+CaCl_2\rightarrow CaCO_3+2KCl\)
\(CaCO_3+2HCl\rightarrow CaCl_2+H_2O+CO_2\)
*Hoàn thành ptpư theo sơ đồ :
\(Cu+\dfrac{1}{2}O_2\underrightarrow{t^o}CuO\)
\(CuO+2HCl\rightarrow CuCl_2+H_2O\)
\(CuCl_2+Fe\rightarrow Cu+FeCl_2\)
(1) Cu(OH)2 -t0-> CuO + H2O
(2) CuO + H2 -t0-> Cu + H2O
(3) Cu + Cl2 -t0-> CuCl2
(4) CuCl2 + 2NaOH - > Cu(OH)2 + 2NaCl
(5) Cu(OH)2 + H2SO4 - > CuSO4 + 2H2O
g) 1. Fe2O3 + 6HCl → 2FeCl3 + 3H2O
2. FeCl3 + 3NaOH → 3NaCl + Fe(OH)3↓
3. 2Fe(OH)3 \(\underrightarrow{to}\) Fe2O3 + 3H2O
4. Fe2O3 + 3H2SO4 → Fe2(SO4)3 + 3H2O
h) 1. ZnCl2 + 2NaOH → 2NaCl + Zn(OH)2↓
2. Zn(OH)2 + 2HCl → ZnCl2 + 2H2O
3. ZnCl2 + 2NaOH → 2NaCl + Zn(OH)2↓
4. NaCl + AgNO3 → NaNO3 + AgCl↓
\(\left(1\right)CuO+H_2SO_4\rightarrow CuSO_4+H_2O\\ \left(2\right)CuSO_4+BaCl_2\rightarrow BaSO_4\downarrow\left(trắng\right)+CuCl_2\\ \left(3\right)CuCl_2+2KOH\rightarrow Cu\left(OH\right)_2\downarrow\left(xanh.lam\right)+2KCl\)
A: CuCO3
B: CuCl2
C: Cu(OH)2
D: CuO
PTHH:
CuCO3 + HCl ===> CuCl2 + CO2 + H2O
CuCl2 + 2NaOH ===> Cu(OH)2 + 2NaCl
Cu(OH)2 =(nhiệt)=> CuO + H2O
CuO + CO =(nhiệt)=> Cu + CO2
b;
CuSO4 + 2NaOH -> Cu(OH)2 + Na2SO4
Cu(OH)2 -> CuO + H2O
CuO + CO -> Cu + CO2
Cu + 2FeCl3 -> 2FeCl2 + CuCl2
a)
2Al2O3 \(\underrightarrow{đp}\) 4Al + 3O2
2Al + 3Cl2 \(\rightarrow\) 2AlCl3
AlCl3 + 3NaOH \(\rightarrow\) Al(OH)3 + 3NaCl
2NaCl + 2H2O \(\rightarrow\) 2NaOH + Cl2 + H2
\(\left(1\right)Cu+\dfrac{1}{2}O_2\xrightarrow[]{t^0}CuO\\ \left(2\right)CuO+2HCl\rightarrow CuCl_2+H_2O\)
\(\left(3\right)CuCl_2+2NaOH\rightarrow Cu\left(OH\right)_2+2NaCl\\ \left(4\right)Cu\left(OH\right)_2+2HNO_3\rightarrow Cu\left(NO_3\right)_2+2H_2O\\ \left(5\right)Cu\left(NO_3\right)_2+Fe\rightarrow Fe\left(NO_3\right)_2+Cu\\ \left(6\right)Fe\left(NO_3\right)_2+2NaOH\rightarrow Fe\left(OH\right)_2+2NaNO_3\)
A là CuO hoặc Cu(OH)2