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moncefsuaaidip5kpre
@moncefsuaaidip5kpre
July 2022
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innysik51511
A)Ca---Ca(OH)2----CaCO3---CaO---CaCl2---Ca
CaO + H2O = Ca(OH)2
Ca(OH)2 + CO2 = CaCO3 + H2O
CaCO3 = CaO + CO2
CaO + 2 HCl = CaCl2 + H2O
3CaCl2 + 2Al = 3Ca + 2AlCl
3
б)P----P2O5---H3PO4----
K3PO4---Ba3(PO4)2-----H3PO4
4 P + 5 O2 = 2 P2O
5
P2O5+3Н2O = 2H3PO4
H3PO4 + 3 KOH = K3PO4 + 3 H2O
2 K3PO4 + 3 BaCl2 = Ba3(PO4)2 + 6 KCl
Ba3(PO4)2 + 6 HF = 2 H3PO4 + 3 BaF
2
в)
H2 + S = H2S
2 H2S + 3 O2 = 2 H2O + 2 SO
2
SO2 + 2NaOH =Na2SO3 + H2O
2 SO2 + O2 = 2 SO
3
SO3 + 2NaOH= Na2SO4 + H2O
SO3 + H2O = H2SO
4
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Answers & Comments
CaO + H2O = Ca(OH)2
Ca(OH)2 + CO2 = CaCO3 + H2O
CaCO3 = CaO + CO2
CaO + 2 HCl = CaCl2 + H2O
3CaCl2 + 2Al = 3Ca + 2AlCl3
б)P----P2O5---H3PO4----K3PO4---Ba3(PO4)2-----H3PO4
4 P + 5 O2 = 2 P2O5
P2O5+3Н2O = 2H3PO4
H3PO4 + 3 KOH = K3PO4 + 3 H2O
2 K3PO4 + 3 BaCl2 = Ba3(PO4)2 + 6 KCl
Ba3(PO4)2 + 6 HF = 2 H3PO4 + 3 BaF2
в)H2 + S = H2S
2 H2S + 3 O2 = 2 H2O + 2 SO2
SO2 + 2NaOH =Na2SO3 + H2O
2 SO2 + O2 = 2 SO3
SO3 + 2NaOH= Na2SO4 + H2O
SO3 + H2O = H2SO4