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sveta14kr
@sveta14kr
August 2022
1
31
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Закончите схемы реакций:
а) SiO2 + Mg ;
б) Na2SiO3 + HCl →
в) Mg2Si + HCl →
Реакцию а) разберите методом электронного баланса.
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Анетка125
SiO2+2Mg=2MgO+Si
Si(+4)+4e=Si(0)
Mg(0)-2e=Mg(+2)
или
SiO2+4Mg=Mg2Si+2MgO
Si(+4)+8e=Si(-4)
Mg(0)-2e=Mg(+2)
Na2SiO3+2HCl=H2SiO3+2NaCl
Mg2Si+4HCl=SiH4+2MgCl2
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Answers & Comments
Si(+4)+4e=Si(0)
Mg(0)-2e=Mg(+2)
или
SiO2+4Mg=Mg2Si+2MgO
Si(+4)+8e=Si(-4)
Mg(0)-2e=Mg(+2)
Na2SiO3+2HCl=H2SiO3+2NaCl
Mg2Si+4HCl=SiH4+2MgCl2