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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
2NaOH+H2SO4--->Na2SO4+2H2O
CuO+2HCl--->CuCl2+H2O
3H2SO4+Al2O3--->Al2(SO4)3+3H2O
Ca(OH)2+2HNO3--->Ca(NO3)2+2H2O
CO2+Ca(OH)2--->CaCO3+H2O
a) NaOH + CuSO4 -> Na2SO4 + Cu(OH)2
b) CuO + 2HCl -> CuCl2 + 2H2O
c) 2Al + 6H2SO4 -> Al2(SO4)3 + 6H2O + 3SO2
d) CaCO3 + HNO3 -> Ca(NO3)2 + CO2 + H2O
f) CO2 + Ca(OH)2 -> CaCO3 + H2O
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
\(1.P_2O_5+3H_2O\rightarrow2H_3PO_4\)
\(2.K_2O+H_2O\rightarrow2KOH\)
\(3.Fe_3O_4+8HCl\rightarrow FeCl_2+2FeCl_3+4H_2O\)
\(4.Na_2O+SO_2\rightarrow Na_2SO_3\)
\(5.P_2O_5+6NaOH\rightarrow2Na_3PO_4+3H_2O\)
\(6.Ba\left(OH\right)_2+H_2SO_4\rightarrow BaSO_4+2H_2O\)
\(7.Fe\left(OH\right)_2+H_2SO_4\rightarrow FeSO_4+2H_2O\)
\(8.Fe_2O_3+3H_2SO_4\rightarrow Fe_2\left(SO_4\right)_3+3H_2O\)
a)SO2,Na2O,CaO,CO2,BaO
SO2+H2O->H2SO3
Na2O+H2O->2NaOH
CaO+H2O->Ca(OH)2
CO2+H2O->H2CO3
BaO+H2O->Ba(OH)2
b)CuO,Na2O,CaO,Al2O3,BaO
CuO+2HCl->CuCl2+H2O
Na2O+2HCl->2NaCl+H2O
CaO+2HCl->CaCl2+H2O
Al2O3+6HCl->2AlCl3+3H2O
BaO+2HCl->BaCl2+H2O
c)SO2,CO2
SO2+2NaOH->Na2SO3+H2O
CO2+2NaOH->Na2CO3+H2O
Bài 2:
a)C+O2->CO2
CO2+CaO->CaCO3
CaCO3+2HCl->CaCl2+CO2+H2O
2CO2+Ca(OH)2->Ca(HCO3)2
b)S+O2->SO2
2SO2+O2->2SO3
SO3+H2O->H2SO4
H2SO4+K2SO3->K2SO4+SO2+H2O
SO2+H2O->H2SO3
1)2 Na +2H2O---->2NaOH+H2
2)SO2+H2O------->H2SO3
3)SO2+CaO---->CaSO3
4)Fe2O3+6HCl--->2FeCl2_+3H20
5)CO2+Ba(OH)2----->BaCO3+H2O
6)ZnO+h2SO4--->ZnSO4+H2O
7) H20+CaO---->Ca(OH)2
8)H2O+CO2---->H2CO3
9)CaO+CO2--->CaCO3
10) Al2O3 +6HCl--->2AlCl3+3H2O
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Nhớ tick cho mk nhé
Câu 4:
\(n_{H_2SO_4}=\dfrac{200.19,6}{98.100}=0,4mol\)
\(n_{BaCl_2}=\dfrac{50.25}{208.100}\approx0,06mol\)
H2SO4+BaCl2\(\rightarrow\)BaSO4\(\downarrow\)+2HCl
-Tỉ lệ: \(\dfrac{0,4}{1}>\dfrac{0,06}{1}\rightarrow H_2SO_4dư\)
\(n_{H_2SO_4\left(pu\right)}=n_{BaSO_4}=n_{BaCl_2}=0,06mol\)
\(m_{BaSO_4}=0,06.233=13,98gam\)
\(n_{HCl}=2n_{BaCl_2}=2.0,06=0,12mol\)
\(n_{H_2SO_4\left(dư\right)}=0,4-0,06=0,34mol\)
\(m_{dd}=200+50-13,98=236,02gam\)
C%HCl=\(\dfrac{0,12.36,5}{236,02}.100\approx1,9\%\)
C%H2SO4=\(\dfrac{0,34.98}{236,02}.100\approx14,12\%\)
Câu 1:\(\%O=\dfrac{48}{2R+48}.100=47\rightarrow\)(2R+48).47=4800
\(\rightarrow\)94R+2256=4800\(\rightarrow\)94R=2544\(\rightarrow\)R=27(Al)
Bạn tự hoàn thành PTHH nhé!
\(1.\\ X_1:MnO_2\\ X_2:HBr\\ X_3:SO_2\\ X_4:Cl_2\\ X_5:H_2O\\ A_1:H_2S\\ A_2:O_2\\ B_1:Ca\left(OH\right)_2\\ B_2:NH_4NO_3\\ D_1:KMnO_4\\ D_2:H_2SO_4\\ D_3:Na_2SO_3\\ 2.\\ A:HCl\\ B:H_2\\ C:Cl_2\\ D:FeCl_3\\ E:Fe\left(OH\right)_3\\ G:NaCl\\ X:NaOH\)
a) CaO + 2HNO3. ---> Ca(NO3)2 + H2O
b) HCl + CuO ---> ..CuCl2 + H2O
c) P2O5. +3 H2O---> 2H3PO4
d) CO2 + 2NaOH ----> Na2CO3+ H2O
e) CaCO3 ---> .CaO. + CO2
f) 2KOH + H2SO4. ---> K2SO4 +2H2O
l) 2H2SO4đn + Cu ---> SO2 + CuSO4 +.2H2O
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