将0.1mol/L的NaHC2O4溶液与0.1mol/L的NaOH溶液等体积混合后,关于该混合溶液说法不正确的是( )
A、该混合溶液中有:c(Na+)+c(H+)=c(HC2O4﹣)+c (OH﹣)+2 c (C2O42﹣)
B、该混合溶液中有:c (Na+)=2 (c(HC2O4﹣)+c (H2C2O4)+c (C2O42﹣))
C、该混合溶液中有:c (OH﹣)﹣c(H+)=c(HC2O4﹣)+2 c (H2C2O4)
D、该混合溶液中有:c (Na+)>c (C2O42﹣)>c(HC2O4﹣)>c (OH﹣)>c(H+)