[{"data":1,"prerenderedAt":-1},["ShallowReactive",2],{"$fB92dvavNDP7-O7Bd7TWoFIzpf2m2y6zWjme_9Oo7AaE":3},{"answer":4,"createTime":5,"id":6,"options":7,"origin":13,"question":20,"related":21,"source":32,"type":33},[],"2025-11-22 00:25:29",238889366,[8,9,10,11,12],"1.0%","1.01%","1.012%","1.0123%","1%",{"count":14,"courseId":15,"courseImg":16,"courseName":17,"workId":18,"workName":19},25,"53e1d2ef4961cca8eea3e23969ad2cb9","https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F03a579384a6dc297c89809b582fcc767.png","默认课程","work_46058544","第一章绪论+第二章 溶液作业","用返滴定法滴定某酸的含量,为了保证测定的准确度,再用浓度相近的HCl返滴定,消耗了39.10mL,正确的报告结果为( )",[22,34,44,54,57,67,77,87,97,107],{"answer":23,"createTime":5,"id":24,"options":25,"question":31,"source":32,"type":33},[],238889363,[26,27,28,29,30],"0.85 mol·L-1","0.8511 mol·L-1","0.8 mol·L-1","0.851 mol·L-1","0.851110 mol·L-1","已知某溶液pH为0.070,H+浓度的正确值为( )","v1",0,{"answer":35,"createTime":5,"id":36,"options":37,"question":43,"source":32,"type":33},[],238889364,[38,39,40,41,42],"5","3","6","4","2","\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F975d65b2da90cacbb97821d726478f0d.webp\"> 的有效结果应取( )有效数字",{"answer":45,"createTime":5,"id":46,"options":47,"question":53,"source":32,"type":33},[],238889365,[48,49,50,51,52],"pH=12.04","0.010","6000","cHCl=0.008 mol·L-1","nNaOH=0.1257 mol","下列各数中,有效数字为4位的是( )",{"answer":55,"createTime":5,"id":6,"options":56,"question":20,"source":32,"type":33},[],[8,9,10,11,12],{"answer":58,"createTime":5,"id":59,"options":60,"question":66,"source":32,"type":33},[],238889367,[61,62,63,64,65],"0.4","0.42","0.420","0.4198","0.41984","按有效数字的运算规则,32.8×0.32\u002F25.00的计算结果为",{"answer":68,"createTime":5,"id":69,"options":70,"question":76,"source":32,"type":33},[],238889368,[71,72,73,74,75],"3;3;3.06","3;4;3.06","4;4;3.06","3;4;3.065","4;3;3.065","1.03与0.2431之和的有效数字是 位;两者积的有效数字是 位;若对3.065取3位有效数字时 ,应为 .下列结果正确的是( )(有效数字位数填写阿拉伯数字)",{"answer":78,"createTime":5,"id":79,"options":80,"question":86,"source":32,"type":33},[],238889369,[81,82,83,84,85],"每100g该浓硫酸中含有98g纯硫酸","该浓硫酸的物质的量浓度约为18.4mol\u002FL","取10mL该浓硫酸,其中所含纯硫酸的质量为18.4g","该浓硫酸中,溶质与溶液的质量比为98:100","若向该浓硫酸中加入少量水,则溶质的质量分数会减小","现有质量分数( ωB )为98%的浓硫酸,其密度为1.84g\u002FmL.下列说法错误的是",{"answer":88,"createTime":5,"id":89,"options":90,"question":96,"source":32,"type":33},[],238889370,[91,92,93,94,95],"9.09%","10.00%","8.33%","9.50%","10.50%","将 5g NaCl溶解在50 g水中,所得溶液的质量分数为多少",{"answer":98,"createTime":5,"id":99,"options":100,"question":106,"source":32,"type":33},[],238889371,[101,102,103,104,105],"稀释前后,溶质的质量保持不变","稀释前后,溶质的物质的量保持不变","稀释定律的核心依据是:c(浓)·V(浓) = c(稀)·V(稀)","使用稀释定律时,V(浓)和V(稀)的单位必须严格统一为升(L)","E. 对于质量分数,若稀释前后溶液密度变化不大,则有m(浓)·ω(浓) ≈ m(稀)·ω(稀)","下列关于稀释定律的表述,哪一项是错误的",{"answer":108,"createTime":5,"id":109,"options":110,"question":116,"source":32,"type":33},[],238889372,[111,112,113,114,115],"每100 mL消毒液中含有75 mL酒精","每100 g消毒液中含有75 g酒精","每100 mol消毒液中含有75 mol酒精","每100 L消毒液中含有75 g酒精","每100 mL消毒液中含有75 g酒精","某酒精消毒液的体积分数为75%,表示什么含义"]