[{"data":1,"prerenderedAt":-1},["ShallowReactive",2],{"$fsgz2HseCFNza-ZVi1gPb7Ua9Ewj5zeV7VEYfJUwpQMg":3},{"answer":4,"createTime":5,"id":6,"options":7,"origin":8,"question":15,"related":16,"source":28,"type":105},[],"2023-07-01 13:53:26",90136987,[],{"count":9,"courseId":10,"courseImg":11,"courseName":12,"workId":13,"workName":14},15,"8452ebe721f45f562cfb214140394d73","https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F2e259dd874575f03625517804903e6f9.jpg","分析化学","d2caf7e68e6c4c55bab2cfe58fb4552f","第五章 课程测试","配制EDTA标准溶液,标定时常用 为基准物",[17,30,40,49,59,69,79,90,100,106],{"answer":18,"createTime":19,"id":20,"options":21,"question":27,"source":28,"type":29},[],"2023-07-01 13:50:58",90134997,[22,23,24,25,26],"1:1","1:2","1:3","1:4","1:5","一般情况下,EDTA与金属离子形成的配位化合物的配位比是( )","v1",0,{"answer":31,"createTime":19,"id":32,"options":33,"question":39,"source":28,"type":29},[],90134998,[34,35,36,37,38],"Y4-","HY3-","H4Y","H2Y2-","H6Y2+","金属离子Mn+主要与EDTA的哪种形式相结合( )",{"answer":41,"createTime":19,"id":42,"options":43,"question":48,"source":28,"type":29},[],90134999,[44,45,46,47],"LiY3- lg稳=2.79","CaY2- lg稳=10.69","MgY2- lg稳=8.69","ZnY2- lg稳=16.50","下列哪种配合物不能用于配位滴定( )",{"answer":50,"createTime":19,"id":51,"options":52,"question":58,"source":28,"type":29},[],90135000,[53,54,55,56,57],"M的水解反应","M与其它离子的配位反应","Y的酸效应","Y与其他金属离子的配位反应","MY的混合配位效应","在配位反应 M + Y = MY中,哪个副反应有利于主反应的进行( )",{"answer":60,"createTime":19,"id":61,"options":62,"question":68,"source":28,"type":29},[],90135001,[63,64,65,66,67],"硝酸","盐酸","氢氧化钠","醋酸-醋酸钠缓冲溶液","氨水-氯化铵缓冲溶液","在配位滴定时,使用铬黑T作指示剂,其溶液的酸度应用( )来调节",{"answer":70,"createTime":19,"id":71,"options":72,"question":78,"source":28,"type":29},[],90135002,[73,74,75,76,77],"紫红→蓝色","蓝色→紫红","无色→蓝色","橙色→蓝色","紫红→无色","配位滴定中用铬黑T作为指示剂时,终点颜色变化为( )",{"answer":80,"createTime":19,"id":81,"options":82,"question":88,"source":28,"type":89},[],90135003,[83,84,85,86,87],"广泛,EDTA几乎能与所有的金属离子形成配合物","稳定,lgK > 15","配合比简单, 一般为1:1","配合反应速度快,水溶性好","EDTA与无色的金属离子形成无色的配合物,与有色的金属离子形成颜色更深的配合物","金属离子与EDTA生成的配合物的特点包括( )",1,{"answer":91,"createTime":19,"id":92,"options":93,"question":99,"source":28,"type":89},[],90135004,[94,95,96,97,98],"配合物的稳定常数足够大","配合比固定","反应速度快","有适当的方法指示滴定终点","生成颜色比较明显的配合物","用于配位滴定的配合反应具备条件( )",{"answer":101,"createTime":5,"id":102,"options":103,"question":104,"source":28,"type":105},[],90136986,[],"EDTA在水溶液中以 种形式存在",2,{"answer":107,"createTime":5,"id":6,"options":108,"question":15,"source":28,"type":105},[],[]]