Ответ:
BaCl2 + H2SO4 → BaSO4 + 2 HCl
K2SiO3 + Na2SO4 → Na2SiO3 + K2SO4
4 HNO3 + Na2S → 2 NaNO3 + S + 2 NO2 + 2 H2O
NaOH + HCl → NaCl + H2O
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Ответ:
BaCl2 + H2SO4 → BaSO4 + 2 HCl
K2SiO3 + Na2SO4 → Na2SiO3 + K2SO4
4 HNO3 + Na2S → 2 NaNO3 + S + 2 NO2 + 2 H2O
NaOH + HCl → NaCl + H2O