[{"data":1,"prerenderedAt":-1},["ShallowReactive",2],{"$fjc9vm1FPE7BVluYvwNhNc7X83GXFcug1_qS6CBMUUWA":3},{"answer":4,"createTime":5,"id":6,"options":7,"origin":12,"question":16,"related":17,"source":27,"type":28},[],"2026-05-30 22:44:34",393618567,[8,9,10,11],"∆lgcK≥5","∆lgcK≥6","∆lgcK ≥7","∆lgcK≥ 8",{"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","当允许误差Et≤±0.5%, 利用控制酸度分别滴定要求( )",[18,29,38,47,56],{"answer":19,"createTime":5,"id":20,"options":21,"question":26,"source":27,"type":28},[],393618563,[22,23,24,25],"108.1","105.6","332.1","203.7","用0.01060 mol·L-1 EDTA标准溶液滴定水中钙和镁的含量,取100.0mL水样,以铬黑T为指示剂,在pH=10时滴定,消耗EDTA 31.30mL.另取一份100.0mL水样,加NaOH使呈强碱性,使Mg2+成Mg(OH)2沉淀,用钙指示剂指示终点,继续用EDTA滴定,消耗19.20mL,则水的总硬度为( ) (以CaCO3 mg·L-1表示)","v1",0,{"answer":30,"createTime":5,"id":31,"options":32,"question":37,"source":27,"type":28},[],393618564,[33,34,35,36],"Mg2+的含量","Ca2+、Mg2+的含量","Al3+、Fe3+的含量","Ca2+、Mg2+、Al3+、Fe3+的含量","某溶液主要含有Ca2+、Mg2+及少量Al3+、Fe3+,今在pH=10时加入三乙醇胺后,用EDTA滴定,用铬黑T为指示剂,则测出的是( )",{"answer":39,"createTime":5,"id":40,"options":41,"question":46,"source":27,"type":28},[],393618565,[42,43,44,45],"沉淀分离法","控制酸度法","络合掩蔽法","溶剂萃取法","在Fe3+、Al3+、Ca2+、Mg2+混合液中,用EDTA滴定Fe3+、Al3+、含量时,为了消除Ca2+、Mg2+的干扰,最简便的方法是( )",{"answer":48,"createTime":5,"id":49,"options":50,"question":55,"source":27,"type":28},[],393618566,[51,52,53,54],"偏高","偏低","无影响","不确定","若配制EDTA溶液时所用水中含有Ca2+,以金属锌为基准物质,二甲酚橙为指示剂标定EDTA溶液,用所得EDTA标准溶液滴定试液中Ca2+ 的含量,结果将( )",{"answer":57,"createTime":5,"id":6,"options":58,"question":16,"source":27,"type":28},[],[8,9,10,11]]