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下列多元酸中(0.1M)能用NaOH标准溶液分步滴定的是:( )
A.
硼酸( K a1 =7.3 × 10 -10 , K a2 =1.8 × 10 -13 , K a3 =1.6 × 10 -14 )
B.
琥珀酸( K a1 =6.4 × 10 -5 , K a2 =2.7 × 10 -6 )
C.
枸缘酸( K a1 =8.7 × 10 -4 , K a2 =1.8 × 10 -5 , K a3 =4.0 × 10 -6 )
D.
顺丁烯二酸( K a1 =1.5 × 10 -2 , K a2 =8.5 × 10 -7 )