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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
\(1.Na+O_2->Na_2O\)
\(2.Na_2O+H_2O->2NaOH\)
\(3.2NaOH+CuSO4->Na_2SO_4+Cu\left(OH\right)_2\)
\(4.Na_2SO_4+BaCl_2->BaSO_4+2NaCl\)
\(5.NaCl+H_2O->NaOH+H_2+Cl_2\)
\(6.Na\left(OH\right)+CuSO_4->Na_2SO_4+Cu\left(OH\right)_2\)
2FeS2+6O2-->Fe2O3+4SO2
2SO2+O2-->2SO3(V2O5,to)
SO3+H2O-->H2SO4
b)2Na+2H2O-->2NaOH+H2
2NaOH+H2SO4-->Na2SO4+2H2O
Na2SO4+Ba(OH)2-->BaSO4+2NaOH
2NaOH+CO2-->Na2CO3+H2O
Na2CO3+2HCl-->2NaCl+H2O+CO2
NaCl+AgNO3-->NaNO3+AgCl
C)
4Al+3O2-->2AL2O3
Al2O3+3H2SO4-->Al2(SO4)3+3H2O
Al2(SO4)3+3Ba(OH)2-->3BaSO4+2Al(OH)3
Al(OH)3+NaOH-->NaAlO2+H2O
NaALO2+H2O+CO2-->Al(OH)3+NaHCO3
Al(OH)3+HCl-->AlCl3+H2O
AlCl3+AgNO3-->Al(NO3)3+AgCl
a) 2FeS2 +11/2O2-----> 4SO2 +Fe2O3
2SO2+O2------> 2SO3
SO3+H2O----- -> H2SO4.
b) 2Na +2H2O-----> 2NaOH+H2
2NaOH+H2SO4----> Na2SO4 +2H2O
Na2SO4+Ba(OH)2----> NaOH +BaSO4
2NaOH+CO2----> Na2CO3+H2O
Na2CO3+2HCl----> 2NaCl+H2O+CO2
NaCl+AgNO3--->NaNO3+AgCl
c) 4Al+3O2--- -> 2Al2O3
Al2O3+3H2SO4 -> Al2(SO4)3+3H2O
Al2(SO4)3+6NaOH-> 2Al(OH)3+3Na2SO4
Al(OH)2+NaOH ----> NaAlO2+2H2O
NaAlO2+2H2O+CO2----> Al(OH)3 +NaHCO3
Al(OH)3+3NaOH----> AlCl3+3NaOH
Alcl3+3AgNO3---> Al(NO3)3+3NaCl
A là NaHSO3
các pthh
2Na+ 2H2O\(\rightarrow\) 2NaOH+ H2\(\uparrow\)
NaOH+ SO2\(\rightarrow\) NaHSO3
NaHSO3+ NaOH\(\rightarrow\) Na2SO3+ H2O
Na2SO3+ H2SO4\(\rightarrow\) Na2SO4+ SO2\(\uparrow\)+ H2O
4Na+O2----->2Na2O
Na2O+H2O--->2NaOH
2NaOH dư+CO2----->Na2CO3+H2O
Na2CO3+CaCl2------>CaCO3+2NaCl
CaCO3---t0---->CaO+CO2
CaO+H2O------>Ca(OH)2
Ca(OH)2+CO2 dư----->Ca(HCO3)2
-)2Na+2H2O----->2NaOH+H2
FeO+2NaOH----->Na2O+Fe(OH)2
Na2O+CO2------->Na2CO3
nNaOH=1,2(mol)
Ta có tỉ lệ :
nNaOH/nCO2=1,6⇒ Tạo hai muối.
CO2+2NaOH⇀Na2CO3+H2O
CO2+NaOH⇀NaHCO3
ta có hệ pt
⇒2x+y=1,2
x+y=0,75
⇒x=0,45;y=0,3
mNa2CO3=n.M=0,3.84=25,2(g)
mNaHCO3=n.M=0,45.106=47,7(g)
mA=25,2+47,7=72,9(g)
b,Na2CO3+BaCl2−−>BaCO3+2NaCl
0.45--------------------->0.45mol
mBaCO3BaCO3=197.0.45=88.65g
4Na + O2 --to--➢ 2Na2O
Na2O + H2O → 2NaOH
2NaOH + SO2 → Na2SO3 + H2O
Na2SO3 + 2HCl → 2NaCl + SO2 + H2O
SO2 + CaO → CaSO3
\(\left(1\right)H_2S+2NaOH\rightarrow2H_2O+Na_2S\)
\(\left(2\right)Na_2S+CuSO_4\rightarrow Na_2SO_4+CuS\)
\(\left(3\right)8Na+10HNO_3\rightarrow3NaNO_3+NH_4NO_3+8H_2O\)
\(\left(4\right)Na_2O+N_2O_5\rightarrow2NaNO_3\)
\(\left(5\right)Na_2O\)
\(\left(6\right)NaHCO_3+Ca\left(OH\right)_2\rightarrow NaOH+H_2O+CaCO_3\)
\(\left(7\right)NaOH+CO_2\rightarrow NaHCO_3\)
\(\left(8\right)2NaOH+CO_2\rightarrow Na_2CO_3+H_2O\)
\(\left(9\right)Na_2CO_3+Ca\left(OH\right)_2\rightarrow2NaOH+CaCO_3\)
\(\left(10\right)2NaOH+SO_3\rightarrow Na_2SO_4+H_2O\)
\(\left(11\right)Na_2SO_4+Ba\left(OH\right)_2\rightarrow BaSO_4+2NaOH\)
\(\left(12\right)NaOH+N_2O_5\rightarrow2NaNO_3\)
\(\left(13\right)Mg\left(HCO_3\right)_2\)
\(\left(14\right)MgSO_4\)
\(\left(15\right)Mg\left(HCO_3\right)_2+2HCl\rightarrow MgCl_2+CO_2+H_2O\)
\(\left(16\right)MgO+2HCl\rightarrow MgCl_2+H_2O\)
\(\text{2Na+2H2O}\rightarrow\text{2NaOH+H2↑}\)
\(\text{2NaOH(đậm đặc)+CO2}\rightarrow\text{Na2CO3+H2O}\)
\(\left\{{}\begin{matrix}\text{CO2+NaOH}\rightarrow\text{NaHCO3}\\\text{H2CO3+NaOH}\rightarrow\text{NaHCO3+H2O}\end{matrix}\right.\)
\(\text{Na2CO3+Ca(OH)2}\rightarrow\text{CaCO3↓+2NaOH}\)
\(\text{CaCO3 + 2HCl → H2O + CO2 + CaCl2}\)
\(\text{CaCl2+Na2CO3}\rightarrow\text{CaCO3↓+2NaCl}\)
\(\text{CaCO3(thể rắn)+CO2+H2O}\rightarrow\text{Ca(HCO3)2(dung dịch pha loãng)}\)
\(\text{Ca(HCO3)2 → CaCO3 + H2O + CO2}\)
\(\text{Ca(HCO3)2 + 2HCl → 2H2O + 2CO2 + CaCl2}\)
\(\text{2Li3PO4+3CaCl2(đậm đặc)}\rightarrow\text{6LiCl↓+Ca3(PO4)2↓}\)
\(\text{NaHCO3+HCl}\rightarrow\text{NaCl+CO2↑+H2O}\)
\(\text{2NaCl+2H2O}\rightarrow\text{H2↑+2NaOH+Cl2↑}\)
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