将pH=2的H2SO4  a L与pH=11的NaOH b L混合后溶液pH=7,则a、b的比值为    

pH=2H2SOa LpH=11NaOH b L混合后溶液pH=7,则ab的比值为                                                             

       A20:1               B1:20               C10:1               D1:10

  

答案

D

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