Si(+4),O(-2);Na(+1), O(-2);K(+1),S(-2);Li(+1),Br(-1)
Скорее всего 2.
H2(+1)SO4(-2)+K(+1)O(-2)H(+1)=K(+1)H(+1)SO4(-2)+H2(+1)O(-2)
Na2SiO3+2HCl=H2SiO3+2NaCl
2Na+SiO3+2H+2Cl=H2SiO3+2Na+2Cl
SiO3+H2=H2SiO3
а) 3 CI 2+Fe= 2 Fe2+CI3
Б)<span>Cl2 + Zn=ZnCl2</span>
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<span>в)</span>
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<span>d)<span>Cl2+ Na=2 Na2 CI</span></span>
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<span><span>e)<span>Cl2 + Cu = CuCl2</span></span></span>
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<span><span><span>f)<span> HCl + HClO → 2HCl + </span>O</span></span></span>
2Na + O₂ = Na₂O₂
Na₂O₂ + 2Na = 2Na₂O
Na₂O + H₂O = 2NaOH
3NaOH + H₃PO₄ = Na₃PO₄ + 3H₂O
2NaOH + CO₂ = Na₂CO₃ + H₂O