[{"data":1,"prerenderedAt":-1},["ShallowReactive",2],{"$fhDR06_JFVlXwHR9sJ33OplrOAjvHhXCDXuyw2D4a2uI":3},{"answer":4,"createTime":5,"id":6,"options":7,"origin":12,"question":16,"related":17,"source":27,"type":28},[],"2026-05-30 22:44:32",393618530,[8,9,10,11],"Zn2+","Fe3+","Ag+","Bi3+",{"courseId":13,"courseImg":14,"courseName":15},"b0a69a972d6a86e51a70f6082d249caf","https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F9c1e48361b00f3ee2086f4e259ed792b.jpg","分析化学智慧课程","在配位滴定中,用返滴定法测定Al3+时,若在pH=5~6时以某金属离子标液返滴过量EDTA,最合适的金属离子标准浓液应该是",[18,29,38,47,56,65,74,83,92,101],{"answer":19,"createTime":5,"id":20,"options":21,"question":26,"source":27,"type":28},[],393618517,[22,23,24,25],"1","3","5","6","EDTA与金属离子络合时形成五元环的数目是","v1",0,{"answer":30,"createTime":5,"id":31,"options":32,"question":37,"source":27,"type":28},[],393618518,[33,34,35,36],"H6Y2+","H4Y","H2Y2-","Y4-","直接与金属离子配位的EDTA型体为",{"answer":39,"createTime":5,"id":40,"options":41,"question":46,"source":27,"type":28},[],393618519,[42,43,44,45],"1︰1","2︰1","1︰3","1︰2","一般情况下,EDTA与金属离子形成的配合物的配位比是",{"answer":48,"createTime":5,"id":49,"options":50,"question":55,"source":27,"type":28},[],393618520,[51,52,53,54],"H3Y","H2Y","HY","Y","已知EDTA的六级解离常数Ka1、Ka2…Ka6分别为10-0.9,10-1.6,10-2.0,10-2.67,10-6.16,10-10.26,在pH=12.0的水溶液中,主要存在形式是",{"answer":57,"createTime":5,"id":58,"options":59,"question":64,"source":27,"type":28},[],393618521,[60,61,62,63],"酸效应系数越大,配合物的稳定性愈大","酸效应系数愈小,配合物的稳定性愈大","pH值愈大,酸效应系数愈大","酸效应系数愈大 ,配位滴定曲线的pM突跃范围愈大","在配位滴定中,下列有关酸效应叙述正确的是",{"answer":66,"createTime":5,"id":67,"options":68,"question":73,"source":27,"type":28},[],393618522,[69,70,71,72],"M与L没有副反应","M与L的副反应相当严重","M的副反应较小","[M]=[L]","αM(L)=1表示",{"answer":75,"createTime":5,"id":76,"options":77,"question":82,"source":27,"type":28},[],393618523,[78,79,80,81],"lgK´MY≥5","lgK´MY≥6","lgK´MY ≥7","lgK´MY ≥ 8","当允许误差Et≤±0.1%, cM = 0.01mol·L-1时, 单一离子准确滴定的要求",{"answer":84,"createTime":5,"id":85,"options":86,"question":91,"source":27,"type":28},[],393618524,[87,88,89,90],"游离指示剂的颜色","EDTA-M配合物的颜色","指示剂-M配合物的颜色","上述A+B的混合色","用EDTA直接滴定有色金属离子M,终点所呈现的颜色是",{"answer":93,"createTime":5,"id":94,"options":95,"question":100,"source":27,"type":28},[],393618525,[96,97,98,99],"指示剂与金属离子生成的配合物不稳定","被测溶液的酸度过高","指示剂与金属离子生成的配合物稳定性小于MY的稳定性","指示剂与金属离子生成的配合物稳定性大于MY的稳定性","配位滴定中,指示剂的封闭现象是由( )引起的",{"answer":102,"createTime":5,"id":103,"options":104,"question":109,"source":27,"type":28},[],393618526,[105,106,107,108],"指示剂不稳","MIn溶解度小","K MInˊ< K MYˊ","K MInˊ> K MYˊ","产生金属指示剂的僵化现象是因为"]