[{"data":1,"prerenderedAt":-1},["ShallowReactive",2],{"$fGANdKaYuDjMDWhVdC7j1ewCt7Tfr6aiT_z--KHgtdS0":3},{"answer":4,"createTime":5,"id":6,"options":7,"origin":12,"question":19,"related":20,"source":31,"type":32},[],"2025-12-06 20:07:17",252865153,[8,9,10,11],"增强硫代硫酸钠的还原性","作抗氧化剂","防止嗜硫细菌生长和硫代硫酸钠的分解","中和硫代硫酸钠的酸性",{"count":13,"courseId":14,"courseImg":15,"courseName":16,"workId":17,"workName":18},23,"53e1d2ef4961cca8eea3e23969ad2cb9","https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F03a579384a6dc297c89809b582fcc767.png","默认课程","work_48372385","第五章 氧化还原滴定法","配制硫代硫酸钠溶液时加入碳酸钠的主要目的是",[21,33,42,45,54,63,72,81,90,99],{"answer":22,"createTime":23,"id":24,"options":25,"question":30,"source":31,"type":32},[],"2025-12-08 22:33:40",252865151,[26,27,28,29],"1:3","1:6","1:12","1:2","用间接碘量法测定BaCl2的纯度时,先将Ba2+沉淀为Ba(IO3)2,洗涤后溶解并酸化,加入过量的KI,然后用Na2S2O3溶液滴定,此处BaCl2与Na2S2O3的计量关系:\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002Fcfada63614e7f7be4e36b99495ad70b0.png\">","v1",0,{"answer":34,"createTime":23,"id":35,"options":36,"question":41,"source":31,"type":32},[],252865152,[37,38,39,40],"NH4F","HCl","邻二氮菲","H2SO4","在含有Fe3+和Fe2+的溶液中,加入下述何种溶液,Fe3+\u002FFe2+电对的条件电位将降低(不考虑离子强度影响)",{"answer":43,"createTime":5,"id":6,"options":44,"question":19,"source":31,"type":32},[],[8,9,10,11],{"answer":46,"createTime":23,"id":47,"options":48,"question":53,"source":31,"type":32},[],252865154,[49,50,51,52],"0.68V","1.44V","1.06V","1.26V","用Ce4+滴定Fe2+,当滴定至50%时,溶液的电位是 (已知Eφ1(Ce4+\u002FCe3+)=1.44V,Eφ1Fe3+\u002FFe2+=0.68V)",{"answer":55,"createTime":23,"id":56,"options":57,"question":62,"source":31,"type":32},[],252865155,[58,59,60,61],"终点不明显","I- 被氧化,Na2S2O3 被分解","反应不定量","I2 易挥发","间接碘法要求在中性或弱酸性介质中进行测定,若酸度大高,将会",{"answer":64,"createTime":23,"id":65,"options":66,"question":71,"source":31,"type":32},[],252865156,[67,68,69,70],"\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002Fcb50d6f0454128eb86d68026c24c014e.png\">","\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F752907c434348de9878c73dfdb20e2d2.png\">","\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F5599314e17462f981b463802d6993bdf.png\">","\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F6a742b72b61c118d16baf1e65ef8ced4.png\">","某对称氧化还原反应为2A++3B4+=2A4++3B2+当反应达到计量点时的电位值是",{"answer":73,"createTime":23,"id":74,"options":75,"question":80,"source":31,"type":32},[],252865157,[76,77,78,79],"\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F278e4f33343e1fb052fb9338e6cf324b.png\">","\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F96743e83972afd961e92beb2be76c24c.png\">","\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F307ec193fa626b1cc5e2c65fc3ddd21c.png\">","\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002Ff630b1fa34d44795297aee6f95f151e5.png\">","已知\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F5666b429d5446e52e55357afe05e64ff.png\"> 那么Fe3+与Sn2+反应的平衡常数的对数值(lgK)为",{"answer":82,"createTime":23,"id":83,"options":84,"question":89,"source":31,"type":32},[],252865158,[85,86,87,88],"先快后慢","先慢后快","始终缓慢滴定","始终快速滴定","用高锰酸钾进行滴定时采用的方式是",{"answer":91,"createTime":23,"id":92,"options":93,"question":98,"source":31,"type":32},[],252865159,[94,95,96,97],"大于0.4V","大于0.6V","大于0.3~ 0.4V","大于0.2V","在氧化还原滴定法中一般氧化剂和还原剂的标准电位的差值至少应为多少才可用氧化还原指示剂指示滴定终点",{"answer":100,"createTime":23,"id":101,"options":102,"question":107,"source":31,"type":32},[],252865161,[103,104,105,106],"Sn2+","Mn2+","Fe2+","Ce3+","在下列电对中,还原能力最强的离子是\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F7864a1a56845b3bae69ea3ed081fe8cb.png\">"]