【单选题】已知Na 2 S 2 O 3 +H 2 SO 4 =Na 2 SO 4 +SO 2 ↑+S↓+H 2 O,下列各组实验中溶液最先变浑浊的是( ) 组号 参加反应的物质 反应温度 (℃) Na 2 S 2 O 3 H 2 SO 4 H 2 O V(mL) c(mol/L) V(mL) c(mol/L) V(mL) A 10 5 0.1 5 0.1 5 B 10 5 0.1 5 0.1 5 C 30...
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