[{"data":1,"prerenderedAt":-1},["ShallowReactive",2],{"$fJ8uPz4HdPPm70rUIi8eTF_-7r14lTyVs9cqTpucZjWw":3},{"id":4,"source":5,"question":6,"options":7,"answer":12,"related":13,"type":24,"origin":111,"createTime":26},249438200,"v1","用连续变化法测定络合物的组成必须遵循的是 ( )",[8,9,10,11],"保持金属离子和配体的浓度都不变","保持配体的浓度不变","保持金属离子浓度和配体的浓度之和不变","保持金属离子的浓度不变",[],[14,27,37,47,57,67,71,81,91,101],{"id":15,"source":5,"question":16,"options":17,"answer":22,"related":23,"type":24,"origin":25,"createTime":26},249438195,"海水平均含1.08╳103 μg•g-1Na+和270μg•g-1 SO42-,海水平均密度为1.02 g•mL-1,已知Ar(Na)=23.0,Mr(SO42-)=96.1,则海水中Na+ 与SO42-物质的量浓度的负对数p Na+和p SO42-分别为()",[18,19,20,21],"4.32和5.54","1.34和2.56","1.48和2.96","2.96和3.56",[],[],0,null,"2025-12-04T00:08:02+08:00",{"id":28,"source":5,"question":29,"options":30,"answer":35,"related":36,"type":24,"origin":25,"createTime":26},249438196,"下列各说法中不正确的是",[31,32,33,34],"相对误差是绝对误差在真值中所占的百分比","绝对误差是测量值与真值之差","总体平均值就是真值","偏差是指测量值与平均值之差",[],[],{"id":38,"source":5,"question":39,"options":40,"answer":45,"related":46,"type":24,"origin":25,"createTime":26},249438197,"将纯酸加入纯水中制成溶液,下列表述中正确的是()",[41,42,43,44],"每升含1.0×10-7mol强酸(如HCl),则该溶液的pH值为7.0","强酸的离解百分数随浓度而变化","酸的\"强\"和\"弱\"与酸的物质的量浓度有关","弱酸的浓度越低,离解的百分数越大",[],[],{"id":48,"source":5,"question":49,"options":50,"answer":55,"related":56,"type":24,"origin":25,"createTime":26},249438198,"从显色反应溶液的吸收曲线可以得到( )",[51,52,53,54],"络合物的组成","待测组分的含量","最大吸收波长","摩尔吸光系数",[],[],{"id":58,"source":5,"question":59,"options":60,"answer":65,"related":66,"type":24,"origin":25,"createTime":26},249438199,"反应2A++3B4+====2A4++3B2+达到化学计量点时电势值为",[61,62,63,64],"(3EΘA+2EΘB)\u002F5","6(EΘA- EΘB)\u002F0.059","(EΘA+ EΘB)\u002F2","(2EΘA+3EΘB)\u002F5",[],[],{"id":4,"source":5,"question":6,"options":68,"answer":69,"related":70,"type":24,"origin":25,"createTime":26},[8,9,10,11],[],[],{"id":72,"source":5,"question":73,"options":74,"answer":79,"related":80,"type":24,"origin":25,"createTime":26},249438201,"已知H3AsO4的pKa1=2.2,pKa2=6.9,pKa3=11.5,在pH=7.0时,溶液中的[H2AsO4-]与[HAsO42-]浓度之比等于()",[75,76,77,78],"10-9.3","10-0.1","102.2","10-4.7",[],[],{"id":82,"source":5,"question":83,"options":84,"answer":89,"related":90,"type":24,"origin":25,"createTime":26},249438202,"若用0.1000 mol·L-1KOH溶液分别滴定25.00mL H2SO4和25.00 mL HAc溶液,若消耗的体积相等,则表示这两种溶液中 ()",[85,86,87,88],"[H+]相等","CH2SO4=CHAc","CH2SO4=2CHAc","2CH2SO4=CHAc",[],[],{"id":92,"source":5,"question":93,"options":94,"answer":99,"related":100,"type":24,"origin":25,"createTime":26},249438203,"已知在1mol·L-1的HCl溶液中,EΘFe3+\u002FFe2+=0.68V,EΘSn4+\u002FSn2+=0.14V.讲20mL 0.10 mol·L-1 Fe3+的HCl溶液与40mL 0.050 mol·L-1SnCl2溶液相混合,平衡时体系的电势为",[95,96,97,98],"0.50V","0.14V","0.68V","0.32V",[],[],{"id":102,"source":5,"question":103,"options":104,"answer":109,"related":110,"type":24,"origin":25,"createTime":26},249438204,"对于AB型沉淀,溶度积Ksp和活度积Kspϴ的关系为( )",[105,106,107,108],"Ksp=Kspϴ","Ksp=γAγBKspϴ","Kspϴ=γAγBKsp","KspKspϴ=1",[],[],{"courseName":112,"courseImg":113,"workName":114,"workId":115,"count":116,"courseId":117},"默认课程","https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F03a579384a6dc297c89809b582fcc767.png","分析化学","exam_168578476",153,"53e1d2ef4961cca8eea3e23969ad2cb9"]