Даны следующие вещества :Zn ,Cu, Al,CaO,SiO2,Fe2O2,NaOH,Al(OH)3,Fe2(SO4)3,CaCO3,Fe(NO3).какие из этих веществ реагируют с соляно
Sergey222 [184]
Zn + 2HCl = ZnCl2 + H2
Al + 3Cl = AlCl3
CaO + 2HCl = CaCl2 + H2O
NaOH + HCl = NaCl + H2O
Al(OH)3 + 3HCl = AlCl3 + 3H2O
Fe2(SO4)3 + 6HCl = 3H2SO4 + 2FeCl3
CaCO3 + 2HCl = H2CO3 + CaCl2
Fe(NO3)3 + 3HCl = FeCl3 + 3HNO3
3С + 4HNO3 = 3CO2 + 4NO + 2H2O
C(0) -4e- ----> C(+4) I 3
N(+5) +3e- --> N(+2) I 4
CaO+H2O = Ca(OH)2
n(CaO)=112/56=2 моль
n(Ca(OH)2)=n(CaO)=2 моль
m(Ca(OH)2)=2*74=148 г
a) <span>Ca(OH)₂+2HNO₃→Ca(NO₃)₂+2H₂O</span>
Ca + 2OH + 2H + 2NO₃ → Ca + 2NO₃ + 2H2O
2OH + 2H → 2H₂O
b) <span>AlCl₃+3KOH→Al(OH₃)↓+3KCl </span>
<span> Al+3Cl + 3K + 3OH → Al(OH₃)↓ + 3K+ 3Cl</span>
<span> Al + 3OH → Al(OH₃)↓</span>
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c) <span>K₂CO₃+2HCl→ 2KCl+ H₂O +CO₂↑</span>
<span> 2K+2CO₃+2H+2Cl → 2K+2Cl +H₂O+CO₂↑</span>
<span> 2CO₃+2H→H₂O+CO₂↑</span>
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d) 3<span>MgSO₄+ 2K₃PO₄--> Mg₃(PO₄)₂+ 3K₂SO₄</span>
<span> 3Mg+3SO₄+6K+2PO₄→Mg₃(PO₄)₂+6K+3SO₄</span>
<span> 3Mg+2PO₄→Mg₃(PO₄)₂</span>
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