.有一混和液可能由NaOH、NaHCO3、Na2CO3中的一种或两种组成.现取等

有一混和液可能由NaOHNaHCO3Na2CO3中的一种或两种组成.现取等体积的两份上述溶液分别以酚酞和甲基橙为指示剂,用同样浓度的盐酸进行滴定,当达到滴定终点时,消耗盐酸的体积分别为V1 mLV2 mL,如,V1V22V1,则上述溶液中的溶质是(  )

ANaHCO3       BNa2CO3       CNaHCO3Na2CO3      DNa2CO3NaOH

答案

D

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