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ksuha132002
@ksuha132002
July 2022
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2. Запишите уравнения реакций, соответствующих схемам превращений:
а) Сa CaO CaCO3 CaCl2 CaSO4
б) Mg MgCl2 Mg(OH)2 MgSO4 BaSO4
в) P P2O5 H3PO4 Na3PO4 Ca3(PO4)2
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6opcy4OK
А) 2Ca+O2=2CaO
CaO+CO2=CaCO3
CaCO3+2HCl=CaCl2+H2O+CO2
CaCl2+K2SO4=CaSO4+2KCl
б) Mg+2HCl=MgCl2+H2
MgCl2+2KOH=Mg(OH)2+2KCl
Mg(OH)2+H2SO4=MgSO4+2H2O
MgSO4+Ba(NO3)2=Mg(NO3)2+BaSO4
в) 4P+5O2=2P2O5
P2O5+3H2O=2H3PO4
2H3PO4+6NaOH=2Na3PO4+3H2O
2Na3PO4+3Ca(NO3)2=6NaNO3+Ca3(PO4)2
1 votes
Thanks 1
mrvladimir2
Verified answer
А) 2Ca+O2=2CaO
CaO+CO2=CaCO3
CaCO3+2HCl=CaCl2+H2O+CO2
CaCl2+Na2SO4=CaSO4+2NaCl
б) Mg+2HCl=MgCl2+H2
MgCl2+2NaOH=Mg(OH)2+2NaCl
Mg(OH)2+H2SO4=MgSO4+2H2O
MgSO4+BaCl2=MgCl2+BaSO4
в) 4P+5O2=2P2O5
P2O5+3H2O=2H3PO4
2H3PO4+6Na=2Na3PO4+3H2
2Na3PO4+3CaCl2=6NaCl+Ca3(PO4)2
0 votes
Thanks 1
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Answers & Comments
CaO+CO2=CaCO3
CaCO3+2HCl=CaCl2+H2O+CO2
CaCl2+K2SO4=CaSO4+2KCl
б) Mg+2HCl=MgCl2+H2
MgCl2+2KOH=Mg(OH)2+2KCl
Mg(OH)2+H2SO4=MgSO4+2H2O
MgSO4+Ba(NO3)2=Mg(NO3)2+BaSO4
в) 4P+5O2=2P2O5
P2O5+3H2O=2H3PO4
2H3PO4+6NaOH=2Na3PO4+3H2O
2Na3PO4+3Ca(NO3)2=6NaNO3+Ca3(PO4)2
Verified answer
А) 2Ca+O2=2CaOCaO+CO2=CaCO3
CaCO3+2HCl=CaCl2+H2O+CO2
CaCl2+Na2SO4=CaSO4+2NaCl
б) Mg+2HCl=MgCl2+H2
MgCl2+2NaOH=Mg(OH)2+2NaCl
Mg(OH)2+H2SO4=MgSO4+2H2O
MgSO4+BaCl2=MgCl2+BaSO4
в) 4P+5O2=2P2O5
P2O5+3H2O=2H3PO4
2H3PO4+6Na=2Na3PO4+3H2
2Na3PO4+3CaCl2=6NaCl+Ca3(PO4)2