Răspuns:
H 2 S + 6 HNO 3 → SO 2 + 6 NO 2 + 4 H 2 O
2 SO 2 + O 2 → 2 SO 3
SO 3 + 2 NaOH → Na 2 SO 4 + H 2 O
BaCl 2 + Na 2 SO 4 → BaSO 4 + 2 NaCl
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Răspuns:
H 2 S + 6 HNO 3 → SO 2 + 6 NO 2 + 4 H 2 O
2 SO 2 + O 2 → 2 SO 3
SO 3 + 2 NaOH → Na 2 SO 4 + H 2 O
BaCl 2 + Na 2 SO 4 → BaSO 4 + 2 NaCl