H2SO4 + K2SiO3 => K2SO4 + H2SiO3↓
K2SO4 + Ba(OH)2 => BaSO4↓ + 2 KOH
<span> г)-фтор
.................................................</span>
Mr(H2SO4) = Mr = 2 * 1 + 32 + 4 * 16 = 98
w(H) = 2Ar(H) / Mr = 2 / 98 = 0.0204 = 2.04%
w(S) = Ar(S) / Mr = 32 / 98 = 0.3265 = 32.65%
w(O) = 4Ar(O) / Mr = 0.6531 = 65.31%
2Zn + O2 = 2ZnO
ZnO + H2SO4 = ZnSO4 + H2O
<span>2ZnSO4 + 2H2O = 2Zn + O2 + 2H2SO<span>4 (Электролиз)
</span></span><span>2Zn + O2 = 2ZnO
</span>ZnO + 2HNO3 = Zn(NO3)2 + H2O