• 2022-06-15
    相同浓度的CO32-、S2-、C2O42-三种碱性物质水溶液, 其碱性强弱(由大至小)的顺序是-------- (已知 H2CO3:pKa1 = 6.38, pKa2 =10.25;H2S:pKa1 =6.88 ,pKa2 = 14.15;H2C2O4:pKa1 = 1.22,pKa2 =4.19 ) (A) CO32->S2->C2O42- (B) S2->C2O42->CO32- (C) S2->CO32->C2O42- (D) C2O42->S2->CO32-