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\(11,Na_2O+H_2O\to 2NaOH\\ 12,Ca(OH)_2+Na_2CO_3\to CaCO_3\downarrow+2NaOH\\ 13,Fe_2O_3+3H_2\xrightarrow{t^o}2Fe+3H_2O\\ 14,Mg(OH)_2+2HCl\to MgCl_2+H_2O\\ 15,2FeCl_3\xrightarrow{t^o}2FeCl_2+Cl_2\\ 16,3AgNO_3+K_3PO_4\to Ag_3PO_4\downarrow+3KNO_3\\ 17,SO_2+Ba(OH)_2\to BaSO_3\downarrow+H_2O\\ 18,2Ag+Cl_2\xrightarrow{t^o}2AgCl\downarrow\\ 19,FeS+2HCl\to FeCl_2+H_2S\\ 20,Pb(OH)_2+2HNO_3\to Pb(NO_3)_2+H_2O\)
Câu 15 PTHH đó k đúng đâu, cho tác dụng với Fe để ra FeCl2
\(MgCl_2+2KOH\rightarrow Mg\left(OH\right)_2+2KCl\)
\(Cu\left(OH\right)_2+2HCl\rightarrow CuCl_2+2H_2O\)
1) MgCl2 + 2KOH → Mg(OH)2 + 2KCl
2) Cu(OH)2 + 2HCl → CuCl2 + 2H2O
\(a,\left(1\right)Fe_2O_3+3H_2\rightarrow2Fe+3H_2O\left(1:3:2:3\right)\)
\(\left(2\right)Mg+2HCl\rightarrow MgCl_2+H_2\left(1:2:1:1\right)\\ \left(3\right)2FeCl_3+3Ca\left(OH\right)_2\rightarrow2Fe\left(OH\right)_3+3CaCl_2\left(2:3:2:3\right)\)
\(\left(4\right)K_2CO_3+2HCl\rightarrow2KCl+H_2O+CO_2\left(1:2:2:1:1\right)\)
\(b,PTHH:2Cu+O_2\underrightarrow{t^o}2CuO\\ Áp.dụng.ĐLBTKL,ta.có:\\ m_{Cu}+m_{O_2}=m_{CuO}\\ m_{O_2}=m_{CuO}-m_{Cu}=32-25,6=6,4\left(g\right)\)
<p font-family:times="" new="" roman,serif;="" font-size:14.0pt;="" line-height:115%"="">1. CaCO3 --to--> CaO + CO2
2. MgCl2 +2 KOH → Mg(OH)2 +2 KCl
3. Cu(OH)2 +2 HCl → CuCl2 + 2H2O
4. P2O5 + 3H2O ----> 2 H3PO4
5. 4P +5 O2 to→ 2P2O5
6. 2Al + 3 H2SO4 ----> Al2(SO4)3 + 3H2
7. Zn + 2 HCl ----> ZnCl2 + H2
8. N2 + O2 to→ 2NO
9. 2NO + O2 to→ 2NO2
10.4NO2 + O2 + 2H2O → 4HNO3
1. CaCO3 ----> CaO + CO2
2. MgCl2 + 2KOH → Mg(OH)2 + 2KCl
3. Cu(OH)2 + 2HCl → CuCl2 + 2H2O
4. P2O5 + 3H2O ----> 2H3PO4
5. 4P + 5O2 → 2P2O5
6. 2Al + 3H2SO4 ----> Al2(SO4)3 + 3H2
7. Zn + 2HCl ----> ZnCl2 + H2
8. N2 + O2 → 2NO
9. 2NO + O2 → 2NO2
10.4NO2 + O2 + 2H2O → 4HNO3
1. 4Na + O2 --- > 2Na2O
2. 2 Al + 3S --- > Al2S3
3. 2Fe(OH)3 + 6HCl --- > 2FeCl3 + 6H2O
4. Fe2O3 + 3H2SO4 --- > Fe2(SO4)3 + 3H2O
5 . 2NaOH + Cu(NO3)2 --- > 2NaNO3 + Cu(OH)2
6 . 4P + 5O2 --- > 2P2O5
1) \(MgCl_2+2KOH\rightarrow Mg\left(OH\right)_2\downarrow+2KCl\)
2) \(Cu\left(OH\right)_2+2HCl\rightarrow CaCl_2+2H_2O\)
3) \(Cu\left(OH\right)_2+H_2SO_4\rightarrow CuSO_4+2H_2O\)
4) FeO + 2HCl --> FeCl2 + H2O
\(Fe+2HCl\rightarrow FeCl_2+H_2\)
\(2Al+3H_2SO_4\rightarrow Al_2\left(SO_4\right)_3+3H_2\)
\(CuO+H_2SO_4\rightarrow CuSO_4+H_2O\)
\(2Al\left(OH\right)_3+3H_2SO_4\rightarrow Al_2\left(SO_4\right)_3+6H_2O\)
\(CuO+2HNO_3\rightarrow Cu\left(NO_3\right)_2+H_2O\)
1. Fe + 2HCl → FeCl2 + H2
2Al + 3H2SO4 → Al2(SO4)3 + 3H2
CuO + H2SO4 → CuSO4 + H2O
2Al(OH)3 + 3H2SO4 → Al2(SO4)3 + 6H2O
CuO + 2HNO3 → Cu(NO3)2 + H2O
\(Cu\left(OH\right)_2+2HCl\rightarrow CuCl_2+2H_2O\\ 2FeI_3\rightarrow2FeI_2+I_2\\ Fe_2O_3+3H_2\rightarrow\left(t^o\right)2Fe+3H_2O\)