[{"data":1,"prerenderedAt":-1},["ShallowReactive",2],{"$fjAIVRKAdN14J2-jjxXFH9UYD4ZV58CY4tju788gdZo8":3},{"answer":4,"createTime":5,"id":6,"options":7,"origin":10,"question":13,"related":14,"source":21,"type":22},[],"2024-07-21 01:35:33",993991733,[8,9],"对","错",{"courseImg":11,"courseName":12},"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F6c3b34b5d04dfc95160fe71bc822338e.jpeg","[公开课]分析化学（福州大学）","在沉淀重量法中,同离子效应和盐效应均使沉淀的溶解度增大",[15,23,28,33,38,43,53,64,73,78],{"answer":16,"createTime":17,"id":18,"options":19,"question":20,"source":21,"type":22},[],"2024-07-21 01:35:32",993990840,[8,9],"在重量分析中,若待测物中特测离子的半径与所含的杂质离子的半径与所含的杂质离子的半径相近,在沉淀过程中往往形成混晶","v2",3,{"answer":24,"createTime":17,"id":25,"options":26,"question":27,"source":21,"type":22},[],993990992,[8,9],"在滴定分析中,一般采用指示剂颜色的突变来判断化学计量点的到达,在指示剂变色时停止滴定.这一点称为滴定误差 ( )",{"answer":29,"createTime":5,"id":30,"options":31,"question":32,"source":21,"type":22},[],993991029,[8,9],"缓冲溶液对外加入的酸碱有缓冲作用,不管酸碱加入量是多是少",{"answer":34,"createTime":5,"id":35,"options":36,"question":37,"source":21,"type":22},[],993991154,[8,9],"在相同的置信水平下,适当增加测定次数n,可使置信区间显著增大,从而提高分析测定的准确度",{"answer":39,"createTime":5,"id":40,"options":41,"question":42,"source":21,"type":22},[],993991167,[8,9],"稀释时酸碱缓冲液溶液的pH值不变",{"answer":44,"createTime":5,"id":45,"options":46,"question":51,"source":21,"type":52},[],993991195,[47,48,49,50],"指示剂的用量","滴定反应条件稳定常数","滴定反应的完全程度","被滴定物质的浓度","影响EDTA配位滴定终点误差的主要因素是( )",1,{"answer":54,"createTime":55,"id":56,"options":57,"question":62,"source":21,"type":63},[],"2024-07-21 01:35:31",993991292,[58,59,60,61],"10","20","25","30","移取一定体积钙溶液,用0.02000 mol\u002FL EDTA溶液滴定时, 消耗25.00 mL;另取相同体积的钙溶液, 将钙定量沉淀为CaC2O4,过滤,洗净后溶于稀H2SO4中,以0.02000 mol\u002FL KMnO4溶液滴定至终点,应消耗溶液体积(mL)为",0,{"answer":65,"createTime":55,"id":66,"options":67,"question":72,"source":21,"type":63},[],993991578,[68,69,70,71],"\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F44a58168ed128bdd294965fcda90c465.png\">","\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002Fa7a30a527555ff5e669089a38c49422d.png\">","\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F81e8c0fa7c538e6b9f6c0ecf862d557f.png\">","\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F578accdf5c78179ee6ba985e7fa1a059.png\">","\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F2904d1b3e8ae26479bf026adf74dc740.png\">",{"answer":74,"createTime":5,"id":75,"options":76,"question":77,"source":21,"type":22},[],993991625,[8,9],"系统误差的大小和正负都可被检验,因而是可以校正的",{"answer":79,"createTime":5,"id":6,"options":80,"question":13,"source":21,"type":22},[],[8,9]]