下列离子方程式正确的是                  (    ) A、向

下列离子方程式正确的是                  (    )

A、向Ba(OH)2溶液中逐滴加入NH4HSO4溶液至刚好沉淀完全

           Ba2++OH-+H++SO42-=BaSO4↓+H2O

B、用石墨作电极电解饱和食盐水 2Cl-+2H2OCl2↑+H2↑+2OH-

C、向NaOH溶液中滴加同浓度的少量Ca(HCO3)2溶液Ca2++HCO3-+OH -=CaCO3↓+H2O

D、FeSO4溶液中加H2O2溶液 Fe2++2H2O2+4H+=Fe3++4H2O

 

答案

B

解析:略

 

相关题目

It’s sports time.Most students in Class 1 are playing football on the playgr
It’s sports time.Most students in Class 1 are playing football on the playground.  A.boy             B.boys C.boy’s          D.boys’
下列现象与电化学腐蚀无关的是A.黄铜(铜锌合金)制作的
下列现象与电化学腐蚀无关的是A.黄铜(铜锌合金)制作的铜锣不易产生铜绿  B.生铁比软铁芯(几乎是纯铁)容易生锈C.铁质器件附有铜质配件,
实验室用下列两种方法制氯气:①用含HCl 146 g的浓盐酸与足
实验室用下列两种方法制氯气:①用含HCl 146 g的浓盐酸与足量的MnO2反应;②用87 g MnO2与足量浓盐酸反应。所得的氯气                      
Premier Wen Jiabao said that if we worked hard and____ optimistic,we were_____ w
Premier Wen Jiabao said that if we worked hard and____ optimistic,we were_____ win the war against the finanical crisis. A. were; bounding    B. were; bound to   C.was; bounding to    D.had; b
6.隋朝将作大匠宇文凯曾严令:官府工匠不得入市工作,其
6.隋朝将作大匠宇文凯曾严令:官府工匠不得入市工作,其晚年回乡后亦受到严密监视且不许“收授学徒”和“制作产品”。上述现象反映了( ) A.官
People should thank the firefighters for the things they do to prevent fires___
People should thank the firefighters for the things they do to prevent fires_______the environment safer.    A. make                B. to make                  C.
 
 
如表是某学习小组测量的小伟同学的胸围长度(cm),则该同
如表是某学习小组测量的小伟同学的胸围长度(cm),则该同学的胸围差是(     ) A.13.6cm      B.10.3cm       C.12.3cm     D.12.6cm

最新题目