[{"data":1,"prerenderedAt":-1},["ShallowReactive",2],{"$fUNt5-9D420EkgCCCgNeCEZ8vlmCSuu6cLAF4p2yjrGQ":3},{"answer":4,"createTime":5,"id":6,"options":7,"origin":12,"question":19,"related":20,"source":30,"type":31},[],"2025-12-09 18:12:54",257341171,[8,9,10,11],"先用铬酸洗液浸泡除去污染物,然后用氢氧化钾--乙醇液除去油污,再用水--洗涤灵洗净","由于锥形瓶一般均有刻度,因此可用锥形瓶代替量筒使用","将锥形瓶内溶液加热煮沸,最好是在石棉网上冷却半分钟后再用自来水冷却","若锥形瓶内残留物不能用瓶刷洗去,只能用瓶刷蘸去污粉,用机器摩擦的原理清洗锥形瓶",{"count":13,"courseId":14,"courseImg":15,"courseName":16,"workId":17,"workName":18},141,"69323048918f204330a17a97f9adb4fd","https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F67f9fd1984c0fe61d4fe4bfe81a47087.jpg","化学检验员 中级","5a3ffdd789694a32be42d27c96f67449","第7课时","在使用锥形瓶的操作中,正确的操作是",[21,32,41,50,59,68,77,86,95,103],{"answer":22,"createTime":5,"id":23,"options":24,"question":29,"source":30,"type":31},[],257341153,[25,26,27,28],"浓硫酸","固体氯化钙","五氧化二磷","碱石灰固体","在干燥器中加入( ),可达到干燥氨气的作用","v1",0,{"answer":33,"createTime":5,"id":34,"options":35,"question":40,"source":30,"type":31},[],257341155,[36,37,38,39],"沉淀重量分析","挥发分重量分析","微量水分重量分析","称量标准操作","在下列叙述中( )不属于称量瓶的应用",{"answer":42,"createTime":5,"id":43,"options":44,"question":49,"source":30,"type":31},[],257341158,[45,46,47,48],"将氯化钡转化成硫酸钡后,通过称量硫酸钡质量,就可换算出氯化钡含量","称取一定量试样,在105℃~ 110℃烘至恒质,就可换算出试样中的水含量","称取一定量试样,在105℃~ 110℃烘30分钟,通过称量试样质量,就可换算出试样中的挥发分含量","在分析天平上称取0.2g~0.3g标准物","在下列分析操作中( )是不属于必须用称量进行称量操作",{"answer":51,"createTime":5,"id":52,"options":53,"question":58,"source":30,"type":31},[],257341160,[54,55,56,57],"直径35mm,瓶高25mm,容量为约10ml","直径25mm,瓶高40mm,容量为约10ml","直径40mm,瓶高25mm,容量为约15ml","直径30mm,瓶高50mm,容量为约15ml","在常用的称量瓶规格中( )是不正确的",{"answer":60,"createTime":5,"id":61,"options":62,"question":67,"source":30,"type":31},[],257341161,[63,64,65,66],"使用烧杯时一定要先洗净烧杯,洗净的标准是杯内无异物,杯壁不挂水珠","烧杯内盛水、溶液或固体物不超过总体积3\u002F4,特别是在加热时更要注意此点","烧杯在加热时,应在石棉网上操作,但对于硬质烧杯,也可以直接在火上加热","烧杯在加热溶液后,可马上在冷水中迅速冷却","在烧杯的使用中常见的错误是",{"answer":69,"createTime":5,"id":70,"options":71,"question":76,"source":30,"type":31},[],257341163,[72,73,74,75],"在烧杯中加入浓硝酸后,不能加热烧杯,否则会造成烧杯严重腐蚀","在烧杯中加入浓硫酸后,不能加热烧杯,否则会发生爆炸","在烧杯中假日稀碱后,多数情况下不能加烧杯,以防止烧杯严重腐蚀","用氟硅酸钾法测定试样中的硅含量时不能使用玻璃烧杯","在使用烧杯时应注意的事项是",{"answer":78,"createTime":5,"id":79,"options":80,"question":85,"source":30,"type":31},[],257341165,[81,82,83,84],"直径105mm,高为145mm","直径145mm,高为105mm","直径89mm,高为255mm","直径115mm,高为196mm","1000ml硬质玻璃烧杯的外直径和高度的尺寸是",{"answer":87,"createTime":5,"id":88,"options":89,"question":94,"source":30,"type":31},[],257341168,[90,91,92,93],"称取一定量的试样于锥形瓶中,加水溶解,应将蒸馏水沿内壁","将溶液加到小于总体积的一半处,平摇锥形瓶","由于锥形瓶一般均有刻度,因此可用于锥形瓶代替量筒使用","若锥形瓶内有残物时,不能用洗涤灵洗净,可用溶液、氢氧化钾--乙醇液、酸性草酸液等洗涤","在使用锥形瓶的操作中,不正确的操作是",{"answer":96,"createTime":5,"id":97,"options":98,"question":102,"source":30,"type":31},[],257341169,[99,8,100,101],"先用水或用水--洗涤灵洗,若未洗净,在考虑选择其他洗涤剂洗","先用氢氧化钾--乙醇液除去油污,然后用铬酸洗液浸泡除去污染物,最后用水洗净","只能用铬酸洗液浸泡,才能将锥形瓶洗净","在洗涤锥形瓶的操作中,正确的是",{"answer":104,"createTime":5,"id":6,"options":105,"question":19,"source":30,"type":31},[],[8,9,10,11]]