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1/ Cao + H2O------> Ca (OH)2
2/ Ca (OH)2 + Fe(NO3)2 -----> Ca (NO3)2+Fe(OH)2
3/ Ca(NO3)2 + H2SO4---> CaSO4+2HNO3
4/ CuCl2 + 2NaOH -----> Cu(OH)2+2NaCl
5/ Cu(OH)2 + Na2SO4-----> CuSO4+2NaOH
6/ CuSO4 +Ba(NO3)2 ------> Cu (NO3)2+BaSO4
7/ CuO +2HCl----> CuCl2+H2O
1. CaO + H2O = Ca(OH)2
2. Ca(OH)2 + 2HNO3 = Ca(NO3)2 + 2H2O
3. Không xảy ra pứ này
4. CuCl2 +2NaOH = 2NaCl + Cu(OH)2
5. Cu(OH)2 + H2SO4 = CuSO4 + 2H2O
6. CuSO4 + Ba(NO3)2 = Cu(NO3)2 + BaSO4
7. CuO + 2HCl = CuCl2 +H2O
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Bài của Duong Le
Thứ nhất: pt số 3 sẽ k xảy ra pứ
Thứ hai: pt số 5 sai
CaCO3+HCl-->CaCl2+CO2+H2O
CaCl2+Na2CO3-->CaCO3+NaCl
CaCO3-->CaO+CO2
CaO+H2O-->Ca(OH)2
Ca(OH)2+HNO3-->Ca(NO3)2+H2O
E)
Cu+O2-->CuO
CuO+H2-->Cu+H2O
CuO+..->Cu(Oh)2
Cu(Oh)2+HCl-->CuCl2+H2o
G)Na2SO3+CaCL2-->CaSO3+NaCl
S+O2-->SO2
SO2+H2O-->H2SO3
H2SO3+Ca--->CaSO3+H2
CaSO3+HCl-->CaCL2+SO2+H2O
S8+O2-->SO3
SO3+H2O-->H2SO4
H2SO4+Fe2O3-->Fe2(SO4)3+H2
Bài 1: 4Na+O2->2Na2O
(2): Na2O +H2O -> 2NaOH
(3): 2NaOH + BaCl2-> 2NaCl + Ba(OH)2
(4): NaCl + AgNO3-> AgCl + NaNO3
phần 2:
(1) 2NaOH + CO2-> Na2CO3 + H2O
(2) Na2CO3 +CaCl2- > CaCO3 + 2NaCl
(3) CaCO3-t0-> CaO + CO2
(4) CaO +H2O -> Ca(OH)2
(5) Ca(OH)2 + BaCl2-> Ba(OH)2 + CaCl2
Bài 1:
1) 4Na + O2 --to--➢ 2Na2O
Na2O + H2O → 2NaOH
2NaOH + 2HCl → 2NaCl + H2O
NaCl + AgNO3 → NaNO3 + AgCl
2) 2NaOH + CO2 → Na2CO3 + H2O
Na2CO3 + CaCl2 → 2NaCl + CaCO3
CaCO3 --to--➢ CaO + CO2
CaO + H2O → Ca(OH)2
Ca(OH)2 + 2HCl → CaCl2 + 2H2O
Cho sơ đồ phản ứng hóa học sau:
Cacbon+ O2 -------> X + CuO ------> Y+ z ------> T +nung ------> CaO + Y
=> Chọn C. CO, CO2, Ca(OH)2, CaCO3.
\(2C+O_2-^{t^o}\rightarrow2CO\)
\(CuO+CO-^{t^o}\rightarrow Cu+CO_2\)
\(CO_2+Ca\left(OH\right)_2\rightarrow CaCO_3+H_2O\)
\(CaCO_3-^{nung}\rightarrow CaO+CO_2\)
a) 2Ca + O2 -to-> 2CaO
CaO + H2O --> Ca(OH)2
Ca(OH)2 + CO2 --> CaCO3 + H2O
CaCO3 + CO2 + H2O --> Ca(HCO3)2
Ca(HCO3)2 -to-> CaCO3 + CO2 + H2O
CO2 + NaOH --> NaHCO3
2NaHCO3 -to-> Na2CO2 + CO2 + H2O
b) MgCO3 + H2SO4 --> MgSO4 + CO2 + H2O
MgSO4 + Na2CO3 --> MgCO3 + Na2SO4
MgCO3 + 2HCl --> MgCl2 + CO2 + H2O
a/ Ca + 1/2 O2 => CaO
CaO + H2O => Ca(OH)2
Ca(OH)2 + CO2 => CaCO3 + H2O
CaCO3 + CO2 + H2O => Ca(HCO3)2
Ca(HCO3)2 => CaCO3 + CO2 + H2O
CO2 + NaOH => NaHCO3
2NaHCO3 => Na2CO3 + CO2 + H2O
b/ MgCO3 + H2SO4 => MgSO4 + CO2 + H2O
MgSO4 + Na2CO3 => Na2SO4 + MgCO3
MgCO3 + 2HCl => MgCl2 + CO2 + H2O
\(CuSO_4\underrightarrow{1}CuCl_2\underrightarrow{2}Cu\left(OH\right)_2\underrightarrow{3}CuO\underrightarrow{4}\\ \left(1\right)CuSO_4+BaCl_2\rightarrow CuCl_2+BaSO_4\\ \left(2\right)CuCl_2+2NaOH\rightarrow2NaCl+Cu\left(OH\right)_2\\ \left(3\right)Cu\left(OH\right)_2\underrightarrow{t^o}CuO+H_2O\\ \left(4\right)CuO+H_2\underrightarrow{t^o}Cu+H_2O\)
\(\text{BaCl2 + CuSO4 → CuCl2 + BaSO4}\)
\(\text{2NaOH + CuCl2 → Cu(OH)2 + 2NaCl}\)
\(\text{Cu(OH)2 → CuO + H2O}\)
\(\text{2CuO → 2Cu + O2}\)
a.
2Al +3 H2SO4=> Al2(SO4)3 + 3H2
Al2(SO4)3 + 6NaOH=> 3Na2SO4 + 2Al(OH)3
Al(OH)3 + 3HCl=> AlCl3 + 3H2O
b.
2fe + 3Cl2=>2 FeCl3
FeCl3 +3 NaOH=> 3NaCl + Fe(OH)3
2Fe(OH)3 => Fe2O3 + 3H2O
Fe2O3 + 6HCl=> 2FeCl3 + 3H2O
c.
CaCO3 => CaO + CO2
CaO + H2O=> Ca(OH)2
Ca(OH)2 + 2HCl=> CaCl2 + 2H2O
CaCl2 + 2AgNO3 => 2AgCl+ Ca(NO3)2
(1) Ca + 2H2O ----> Ca(OH)2 + H2
(2) Ca(OH)2 --to--> CaO + H2O
(3) CaO + CO2 ----> CaCO3
(4) CaCO3 + CO2 + H2O ----> Ca(HCO3)2
(5) Ca(HCO3) --to--> CaCO3\(\downarrow\) + H2O + CO2
1.
2Cu + O2 -(to) → 2 CuO
CuO + H2SO4 → CuSO4 + H2O
CuSO4 + BaCl2 → CuCl2 + BaSO4↓
CuCl2 + 2AgNO3 → Cu(NO3)2 + 2AgCl↓
Cu(NO3)2 + NaOH → Cu(OH)2↓ + 2NaNO3
Cu(OH)2 → CuO + H2O
CuO + CO → Cu + CO2
2.
4Al + 3O2 → 2Al2O3
Al2O3 + 6HCl → 2AlCl3 + 3H2↑
AlCl3 + 3NaOH(vừa đủ) → Al(OH)3 + 3NaCl
2Al(OH)3 → Al2O3 + 3H2O
2Al2O3-(đpnc) → 4Al + 3O2↑
2Al + 2NaOH + 2H2O → 2NaAlO2 + 3H2↑
a)
CaCO3 → CaO + CO2 (to)
CaO + H2O → Ca(OH)2
Ca(OH)2 + CO2 → CaCO3 + H2O
b)
CaO + 2HCl → CaCl2 + H2O
c)
Ca(OH)2 + 2AgNO3 → Ca(NO3)2 + Ag2O + H2O
a. Cu(NO3)₂ -> Cu -> CuSO4 → Cu(NO3)₂
Cu(NO3)2+Fe->Fe(NO3)2+Cu
Cu+2H2SO4đ-to>CuSO4+SO2+2H2O
CuSO4+Ba(NO3)2->BaSO4+Cu(NO3)2
b. Ca(NO3)₂ -> CaCO3 → CaSO4 -> CaSO3 -> CaO → Ca(OH)₂ → Ca(HCO3)₂
Ca(NO3)2 + Na2CO3 → CaCO3 ↓ + 2NaNO3
CaCO3+H2SO4->CaSO4+H2O+CO2
CaSO4+.....->CaSO3 ko có pứ
CaSO3-to->CaO+SO2
CaO+H2O->Ca(OH)2
Ca(OH)2+2CO2->Ca(HCO3)2