[{"data":1,"prerenderedAt":-1},["ShallowReactive",2],{"$fXabND9IW-sM35pm1VHMWL5qgT3IjIzMwNM1j3cp0iEY":3},{"answer":4,"createTime":5,"id":6,"options":7,"origin":12,"question":16,"related":17,"source":28,"type":29},[],"2026-05-30 22:44:33",393618540,[8,9,10,11],"Zn2+","Mg2+","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","在络合滴定中,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液应该是( )",[18,30,33,42,51,56],{"answer":19,"createTime":20,"id":21,"options":22,"question":27,"source":28,"type":29},[],"2026-04-30 07:03:09",355002651,[23,24,25,26],"可换钻套","特殊钻套","固定钻套","快换钻套","在钻床上依次对同一孔进行钻、扩、铰加工时,通常使用( )","v1",0,{"answer":31,"createTime":5,"id":6,"options":32,"question":16,"source":28,"type":29},[],[8,9,10,11],{"answer":34,"createTime":5,"id":35,"options":36,"question":41,"source":28,"type":29},[],393618541,[37,38,39,40],"返滴定法","直接滴定法","置换滴定法","间接滴定法","Ca+离子与EDTA的滴定反应,宜采用的滴定方式为( )",{"answer":43,"createTime":5,"id":44,"options":45,"question":50,"source":28,"type":29},[],393618542,[46,47,48,49],"108.1","133.2","332.1","203.7","用0.01060 mol·L-1 EDTA标准溶液测定水的总硬度,取100.0 mL水样,以铬黑T为指示剂,在pH=10时滴定,消耗EDTA 31.30 mL.则水的总硬度(以CaCO3 mg·L-1表示,M(CaCO3 )=100.1)为( )",{"answer":52,"createTime":5,"id":53,"options":54,"question":55,"source":28,"type":29},[],393618543,[38,39,37,40],"铝盐药物的测定常用配位滴定法.加入过量EDTA,加热煮沸片刻后,再用标准锌溶液滴定,该滴定方式是( )",{"answer":57,"createTime":5,"id":58,"options":59,"question":64,"source":28,"type":29},[],393618544,[60,61,62,63],"49.15","98.31%","9.83%","4.92%","用配位滴定法测定氯化锌的含量.称取0.2500 g试样,溶解后,稀释至250 mL,吸取25.00 mL,在pH=5~6时,以二甲酚橙做为指示剂,用去0.01024 mol·L-1 的EDTA标准溶液17.61 mL.则试样中ZnCl2的质量分数ω(ZnCl2)为( ).(M(ZnCl2)= 136.3 g·mol-1)"]