Cu --> CuCl2 --> Cu(OH)2 --> CuO --> CuCl2
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Dãy biến đổi nào sau đây có thể thực hiện trực tiếp?
A) Cu(OH)2 --> CuO --> Cu --> CuCl2
B) CuO --> Cu --> Cu(OH)2 --> CuCl2
C) CuO --> Cu(OH)2 --> CuCl2 --> Cu
D) Cu --> CuO --> Cu(OH)2 --> CuCl2.
A/
Cu(OH)2 => (to) CuO + H2O
CuO + H2 => (to) Cu + H2O
Cu +Cl2 => CuCl2
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A/
Cu(OH)2\(\xrightarrow[]{to}\) CuO+ H2O
CuO+ H2\(\xrightarrow[]{to}\) Cu+ H2O
Cu+ 2FeCl3\(\rightarrow\) 2FeCl2+ CuCl2
B/
CuO+ CO\(\xrightarrow[]{to}\) Cu+ CO2
Cu+ \(\frac{1}{2}\)O2+ H2O\(\rightarrow\) Cu(OH)2
Cu(OH)2+ 2HCl\(\rightarrow\) CuCl2+ 2H2O
C/
CuO+ C2H5OH\(\rightarrow\) CH3CHO+ Cu(OH)2\(\downarrow\)+ H2O
Cu(OH)2+ 2HCl\(\rightarrow\) CuCl2+ 2H2O
CuCl2+ Fe\(\rightarrow\) FeCl2+ Cu
D/
2Cu+ O2\(\xrightarrow[]{to}\) 2CuO
CuO+ C2H5OH\(\rightarrow\) CH3CHO+ Cu(OH)2\(\downarrow\)+ H2O
Cu(OH)2+ 2HCl\(\rightarrow\) CuCl2+ 2H2O
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Cu -> CuO -> CuSO4 -> CuCl2 -> Cu(NO3)2 -> Cu(OH)2 -> CuO -> Cu
\(Cu\overset{\left(1\right)}{-->}CuO\overset{\left(2\right)}{-->}CuSO_4\overset{\left(3\right)}{-->}CuCl_2\overset{\left(4\right)}{-->}Cu\left(NO_3\right)_2\overset{\left(5\right)}{-->}Cu\left(OH\right)_2\overset{\left(6\right)}{-->}CuO\overset{\left(7\right)}{-->}Cu\)
\(\left(1\right)2Cu+O_2\overset{t^o}{--->}2CuO\)
\(\left(2\right)CuO+H_2SO_4--->CuSO_4+H_2O\)
\(\left(3\right)CuSO_4+BaCl_2--->BaSO_4\downarrow+CuCl_2\)
\(\left(4\right)CuCl_2+2AgNO_3--->2AgCl\downarrow+Cu\left(NO_3\right)_2\)
\(\left(5\right)Cu\left(NO_3\right)_2+2NaOH--->Cu\left(OH\right)_2\downarrow+2NaNO_3\)
\(\left(6\right)Cu\left(OH\right)_2\overset{t^o}{--->}CuO+H_2O\)
\(\left(7\right)CuO+H_2\overset{t^o}{--->}Cu+H_2O\)
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\(2Cu+O_2\underrightarrow{t^o}2Cuo\)
\(CuO+H_2SO_4->CuSO_4+H_2O\)
\(CuSO_4+BaCl_2->BaSO_4\downarrow+CuCl_2\)
\(CuCl_2+2AgNO_3->Cu\left(NO_3\right)_2+2AgCl\downarrow\)
\(Cu\left(NO_3\right)_2+2NaOH->Cu\left(OH\right)_2\downarrow+2NaNO_3\)
\(Cu\left(OH\right)_2\underrightarrow{t^o}CuO+H_2O\)
\(CuO+H_2\underrightarrow{t^o}Cu+H_2O\)
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3. viết PTHH thực hiện dãy biến hóa sau:
a. Cu-CuSO4-CuCl2-Cu(NO3)-Cu(OH)2-CuO-CuCl2-Cu-CuCl2-Cu(OH)2
b.Na-Na2O-NaOH-Na2CO3-Na2SO4-NaCl-NaOH-Na3PO4-NaOH
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)
\(4Na+O2-^{t0}->2Na2O\)
\(Na2O+H2O->2NaOH\)
\(2NaOH+CO2->Na2CO3+H2O\)
\(Na2CO3+H2SO4->Na2SO4+CO2\uparrow+H2O\)
\(Na2SO4+BaCl2->2NaCl+BaSO4\downarrow\)
\(2NaCl+2H2O-\xrightarrow[có-màng-ngăn]{đpdd}2NaOH+Cl2\uparrow+H2\uparrow\)
\(3NaOH+H3PO4->Na3PO4+3H2O\)
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CuO,CuSO4,Cu(OH)2,CuCl2,Cu(NO3)2,Cu
Tham khảo
(1) 2Cu + O2 ---> 2CuO
(2) CuO + H2SO4 ---> CuSO4 + H2
(3) CuSO4 + 2NaOH ---> Cu(OH)2 + Na2SO4
(4) Cu(OH)2 + 2HCl ---> CuCl2 + 2H2O
(5) CuCl2 + 2AgNO3 ----> Cu(NO3)2 + 2AgCl
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d. Cu -> CuO ->CuCl2 ->Cu(OH)2 -> CuSO4 ->CuCl2 ->Cu e. Al ->Al2(SO4)3 ->AlCl3->Al(OH)3 - Al2O3 ->Al -> Al2O3 i. Mg -> MgO ->MgSO4 ->Mg(OH)2 ->MgO->MgCl2->Mg(NO3)2
Cu->CuO->CuCl2->Cu(OH)2->CuSO4->Cu(NO3)2
help mik vs
\(2Cu+O_2\underrightarrow{t^o}2CuO\)
\(CuO+2HCl->CuCl_2+H_2O\)
\(CuCl_2+2NaOH->Cu\left(OH\right)_2\downarrow+2NaCl\)
\(Cu\left(OH\right)_2+H_2SO_4->CuSO_4+2H_2O\)
\(CuSO_4+Ba\left(NO_3\right)_2->Cu\left(NO_3\right)_2+BaSO_4\downarrow\)
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Hoàn thành chuỗi biến hóa sau: CuO -> CuCl2 -> Cu(OH)2 -> CuSO4 -> CuCl2
\(\left(1\right)CuO+2HCl\rightarrow CuCl_2+H_2O\\ \left(2\right)CuCl_2+2KOH\rightarrow Cu\left(OH\right)_2\downarrow+KCl\\ \left(3\right)Cu\left(OH\right)_2+H_2SO_4\rightarrow CuSO_4+2H_2O\\ \left(4\right)CuSO_4+BaCl_2\rightarrow CuCl_2+BaSO_4\downarrow\)
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Câu 1: Viết dãy chuyển hoá sau :Cu(OH)2 -------> CuO -------> CuCl2 -------> Cu(NO3)2 -------> Cu(OH)2 .
$Cu(OH)_2 \xrightarrow{t^o} CuO + H_2O$
$CuO + 2HCl \to CuCl_2 + H_2o$
$CuCl_2 + 2AgNO_3 \to Cu(NO_3)_2 + 2AgCl$
$Cu(NO_3)_2 + 2KOH \to Cu(OH)_2 + 2KNO_3$
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Câu 1: Viết dãy chuyển hoá sau :Cu(OH)2 =>CuO=>CuCl2=>Cu(NO3)2=>Cu(OH)2 .