[{"data":1,"prerenderedAt":-1},["ShallowReactive",2],{"$fg0_muspcQTSikCMtZ8bySbHDawmYblGeTtqEU28kILQ":3},{"answer":4,"createTime":5,"id":6,"options":7,"origin":12,"question":15,"related":16,"source":24,"type":40},[],"2026-01-21 09:42:38",1078360752,[8,9,10,11],"充填料","增加表面活性剂在织物表面的吸附量","防止结块","增加洗衣粉的碱性",{"courseImg":13,"courseName":14},"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002Fffd30bd9b171f3bda7487b5e02d8f0f4.jpg","[共享课]基础化学实验1","洗衣粉中的硫酸钠起哪些作用",[17,26,31,41,51,60,69,74,83,93],{"answer":18,"createTime":5,"id":19,"options":20,"question":23,"source":24,"type":25},[],1078360607,[21,22],"对","错","KMnO4读数时,读取液面的凹液面","v2",3,{"answer":27,"createTime":5,"id":28,"options":29,"question":30,"source":24,"type":25},[],1078360627,[21,22],"蒸馏时,若加热前忘记加沸石,在接近沸腾时不能补加,必须等液体稍冷时再补加,然后重新加热",{"answer":32,"createTime":5,"id":33,"options":34,"question":39,"source":24,"type":40},[],1078360631,[35,36,37,38],"乙酸","乙醇","丁酸","硫酸","粗乙酸乙酯溶液中,可能含有哪些杂质",1,{"answer":42,"createTime":5,"id":43,"options":44,"question":49,"source":24,"type":50},[],1078360644,[45,46,47,48],"由黄色变为红色","由红色变为黄色","由红色变为无色","没有变化","向试管中加入1 mL 0.1 mol \u002FL HAc溶液和1滴甲基橙指示剂,摇匀,然后加入少许NaAc固体,待固体溶解后,观察溶液颜色( )",0,{"answer":52,"createTime":5,"id":53,"options":54,"question":59,"source":24,"type":40},[],1078360671,[55,56,57,58],"此法可加快过滤速度","向布氏漏斗中转移混合物时应先转移溶液,再转移沉淀","抽滤中的吸滤瓶外表形状与锥形瓶十分相似,但厚度要比锥形瓶要厚一些","将滤纸放入布氏漏斗内,微接橡皮管,抽气使滤纸紧贴在漏斗瓷板上","下列关于抽滤的说法正确的是( )",{"answer":61,"createTime":5,"id":62,"options":63,"question":68,"source":24,"type":50},[],1078360684,[64,65,66,67],"氯化银电极","双液接饱和甘汞电极","单盐桥甘汞电极","铂丝电极","在测自来水中氯离子含量时,选用的参比电极是( )",{"answer":70,"createTime":5,"id":71,"options":72,"question":73,"source":24,"type":25},[],1078360726,[21,22],"装柱时,树脂上部应保留1~2 cm高的水",{"answer":75,"createTime":5,"id":76,"options":77,"question":82,"source":24,"type":50},[],1078360744,[78,79,80,81],"Ag2CrO4先沉淀","AgCl先沉淀","同时出现Ag2CrO4和AgCl沉淀","无法确定","在Cl-和CrO42-离子浓度都是0.1 mol \u002FL的混合溶液中,逐滴加入AgNO3溶液(忽略体积变化),则( )",{"answer":84,"createTime":85,"id":86,"options":87,"question":92,"source":24,"type":50},[],"2026-01-21 09:42:37",1078360746,[88,89,90,91],"用25 mL的碱式滴定管量取14.8 mL的KMnO4溶液","用10 mL量杯量取6.2 mL浓盐酸","用托盘天平称取25.20 g NaCl","用100 mL容量瓶配制100.00 mL 准确浓度的盐酸","下列实验操作所用仪器合理的是( )",{"answer":94,"createTime":5,"id":6,"options":95,"question":15,"source":24,"type":40},[],[8,9,10,11]]