[{"data":1,"prerenderedAt":-1},["ShallowReactive",2],{"$fxjJdxUUpU-BZ8kZq5a-f0ROd3f1q0mCQhqHDAUOTdZw":3},{"answer":4,"createTime":5,"id":6,"options":7,"origin":8,"question":15,"related":16,"source":27,"type":110},[],"2024-04-30 03:23:29",141037229,[],{"count":9,"courseId":10,"courseImg":11,"courseName":12,"workId":13,"workName":14},37,"ed95dd46d5e443f7b65273f423b0039e","https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002Fdb3a5eb6177bf85ad556cb52c242afa2.jpg","分析化学(A)","work_34377372","","金属离子的副反应系数\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F0ae7c8e5d5608e51c0799d5d68f7c041.png\">表示____,其数学表达式为\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F0ae7c8e5d5608e51c0799d5d68f7c041.png\"> =____",[17,29,38,47,56,65,74,83,92,101],{"answer":18,"createTime":19,"id":20,"options":21,"question":26,"source":27,"type":28},[],"2024-04-29 18:32:08",140966543,[22,23,24,25],"变色灵敏","有封闭可能","有僵化可能","无法确定","在EDTA配位滴定中,当 \u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002Fe6bc03231b5fc056a4639df09e2c2bd4.png\">,则此指示剂在终点时将","v1",0,{"answer":30,"createTime":19,"id":31,"options":32,"question":37,"source":27,"type":28},[],140966544,[33,34,35,36],"1.29","-9.40","10.69","9.40","用EDTA滴定Ca2+反应的\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002Fbdbf3e9f5943c7de1cf263240a640fdc.png\">=10.69.当pH=9.0时,Y4-的lgαY(H)=1.29,则该反应的\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002Fc4c26a068d9aa9ba2ac0ec812b254dc5.png\">等于",{"answer":39,"createTime":19,"id":40,"options":41,"question":46,"source":27,"type":28},[],140966545,[42,43,44,45],"被滴物M在终点时未反应的浓度的负对数","被滴物M在化学计量点时未反应的浓度的负对数","A与B两项的负对数之差值","A与B两项中浓度之差值","EDTA配位滴定终点误差公式中的\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F6e612dd43a360f16b81d78b19780ec41.png\">表示",{"answer":48,"createTime":19,"id":49,"options":50,"question":55,"source":27,"type":28},[],140966546,[51,52,53,54],"0.36%","28%","2.8%","3.6%","某酸度下的EDTA溶液中,Y4-的酸效应系数αY(H)=28,则该离子在溶液中所占的百分比为",{"answer":57,"createTime":19,"id":58,"options":59,"question":64,"source":27,"type":28},[],140966547,[60,61,62,63],"配位掩蔽","调节酸度","将Fe3+沉淀分离","氧化还原掩蔽","已知\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F4f1053c972106f1b30d439be3c29bcfa.png\">= 27.9,\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F6102f61ea87aeff16decfdee01923d87.png\"> = 25.1 (Fe3+), \u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F6102f61ea87aeff16decfdee01923d87.png\">=14.3 (Fe2+).欲用EDTA测定Fe3+,Bi3+混合溶液中,Bi3+.消除Fe3+的干扰应采用的方法是",{"answer":66,"createTime":19,"id":67,"options":68,"question":73,"source":27,"type":28},[],140966548,[69,70,71,72],"用于配制PAN的溶剂是乙醇","PAN适用的pH范围很宽,为2~12","PAN指示剂最适用于EDTA滴定钙镁总量","PAN与大多数金属离子(Cu2+,Zn2+除外)形成难溶配合物","在EDTA配位滴定中,下列有关PAN指示剂的叙述错误的是",{"answer":75,"createTime":19,"id":76,"options":77,"question":82,"source":27,"type":28},[],140966549,[78,79,80,81],"KCN或抗坏血酸","盐酸羟胺或三乙醇胺","三乙醇胺或KCN","盐酸羟胺或抗坏血酸","用EDTA滴定Ca2+,Mg2+时,为消除Fe3+的干扰,应选用的掩蔽剂是",{"answer":84,"createTime":19,"id":85,"options":86,"question":91,"source":27,"type":28},[],140966550,[87,88,89,90],"偏高","偏低","不能确定","无影响","用含有少量Cu2+的蒸馏水配制EDTA溶液,在pH=5,以二甲酚橙为指示剂,用锌标准溶液标定EDTA溶液的浓度,然后用此EDTA溶液在pH=10,以铬黑T为指示剂滴定试样中的Ca2+.测定结果将:(已知\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F15f2d16b4a87cd566a49877be3d1efdf.png\">=18.8, \u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F82520634ae934bb806c9e339982c3ccd.png\">= 16.5, \u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002Fbdbf3e9f5943c7de1cf263240a640fdc.png\">=10.7)",{"answer":93,"createTime":19,"id":94,"options":95,"question":100,"source":27,"type":28},[],140966551,[96,97,98,99],"\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F01bb1c57f676a45f9f8efbf3c94dfcc8.png\">","\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002Ffaf362ef818024fbc6ff17a262bc6dd0.png\">","\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F6f24b40991467f9ae1fd35e37b865fd9.png\">","\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002Fff1d4df0c4921d443eaff0aa7986ad6a.png\">","在氨性缓冲溶液中,用EDTA标准溶液滴定Zn2+.滴定到达化学计量点时,下述关系式成立的是",{"answer":102,"createTime":19,"id":103,"options":104,"question":109,"source":27,"type":28},[],140966552,[105,106,107,108],"159.7","79.85","319.4","6.262","20.00 mL 0.0500 mol·L-1 EDTA溶液相当于Fe2O3 (M=159.7 g·mol-1)的质量(单位:mg)为",2]