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*Hoàn thành ptpư theo sơ đồ :
\(Cu+\dfrac{1}{2}O_2\underrightarrow{t^o}CuO\)
\(CuO+2HCl\rightarrow CuCl_2+H_2O\)
\(CuCl_2+Fe\rightarrow Cu+FeCl_2\)
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↓
(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
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
A: Al..................................................D:Al2O3
B: Ca(AlO2)2.....................................E:AlCl3
C: Al(OH)3
Ta có các phương trình phản ứng sau:
Al + Ca(OH)2 + H2O ➞ Ca(AlO2)2 + H2
Ca(AlO2)2 + 2 HCl + 2 H2O ➞ 2 Al(OH)3 + CaCl2
2 Al(OH)3 ➞tO Al2O3 + 3 H2O
2 Al2O3 ➞(đpnc) 4 Al + 3 O2
2 Al + 3 FeO ➞ Al2O3 + 3 Fe
Al2O3 + 6 HCl ➞ 2 AlCl3 + 3 H2O
2 AlCl3 + 3 Mg ➞ 2 Al + 3 MgCl2
\(\left(1\right)C_3H_8\rightarrow CH_4+C_2H_4\left(đk:t^o\right)\)
\(\left(2\right)CH_4+Cl_2\rightarrow CH_3Cl+HCl\left(đk:as\right)\)
\(\left(3\right)CH_3Cl+NaOH\rightarrow CH_3OH+NaCl\left(đk:t^o\right)\)
\(\left(4\right)CH_3OH+CuO\rightarrow HCHO+Cu+H_2O\left(đk:t^o\right)\)
\(\left(5\right)HCHO+\dfrac{1}{2}O_2\rightarrow HCOOH\left(đk:xtMnO_2\right)\)
\(\left(6\right)HCOOH+2\left(Ag\left(NH_3\right)_2\right)OH\rightarrow\left(NH_4\right)_2CO_3+2Ag\downarrow+2H_2O+2NH_3\uparrow\)
\(\left(7\right)\left(NH_4\right)_2CO_3+2HCl\rightarrow2NH_4Cl+H_2O+CO_2\uparrow\)
\(\left(8\right)\left(NH_4\right)_2CO_3+2NaOH\rightarrow Na_2CO_3+2NH_3\uparrow+H_2O\)
CaO+H2O---->Ca(OH)2
Pt2 ko ổn lw
Na2CO3+2HCl----->2NaCl+H2O+CO2
2NaCl+H2SO4---->Na2SO4+2HCl
Na2SO4+BaCl2---->2NaCl+BaSO4
2NaCl+2H2O---->Cl2+H2+2NaOH
NaOH+HCl----->NaCl+H2O
2NaCl+H2SO4---->Na2SO4+2HCl
a) 1: Na + O2 \(\rightarrow\) Na2O
2: Na2O + H2O \(\rightarrow\) 2NaOH
3: NaOH + SO3 \(\rightarrow\) Na2SO4 + H2O
4: Na2SO4 + BaCl2 \(\rightarrow\) NaCl + BaSO4
b) 1: CaO + H2O \(\rightarrow\) Ca(OH)2
2: Ca(OH)2 + H2CO3 \(\rightarrow\) CaCO3 + 2H2O
3: CaCO3 \(\underrightarrow{t^o}\) CaO + CO2
4: CaO + HCl \(\rightarrow\) CaCl2 + H2O
A là CuO hoặc Cu(OH)2