下列离子方程式书写正确的是 A.明矾溶液中滴入 Ba(OH)2 溶液使 SO42

下列离子方程式书写正确的是

A.明矾溶液中滴入 Ba(OH)2 溶液使 SO42恰好完全沉淀:

 2Ba23OHAl32SO422BaSO4Al(OH)3

B.用惰性电极电解 AlCl3 溶液产生白色沉淀:2Al3++6Cl-+6H2O =Al(OH)3↓+3H2↑+3Cl2

C.用酸性 K2Cr2O7 溶液检验酒精:

3CH3CH2OH2Cr2O722H2O===4Cr(OH)33CH3COOOH

D.用足量的氨水处理硫酸工业的尾气: SO2NH3·H2O===NH4+HSO3

 

答案

B

 

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