Make up the reaction equation: a) SiO2 – Si – Ca2Si – SiH4 – SiO2 – Si b) Si – SiO2 – Na2SiO3 – H2SiO3 – SiO2 – Si
| June 14, 2021 | education
a) the first chain.
1) SiO2 + 2C = Si + 2CO.
2) Si + 2Ca = Ca2Si.
3) Ca2Si + 4HCl = 2CaCl2 + SiH4.
4) SiH4 + 2O2 = SiO2 + 2H2O.
5) SiO2 + 2Mg = 2MgO + Si.
b) the second chain.
1) Si + O2 = SiO2.
2) SiO2 + 2NaOH = Na2SiO3 + H2O.
3) Na2SiO3 + 2HCl = 2NaCl + H2SiO3.
4) H2SiO3 = H2O + SiO2.
5) SiO2 + C = CO2 + Si.
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