[{"data":1,"prerenderedAt":-1},["ShallowReactive",2],{"$foXpa6n8NyGEXUzyEohmDt1wybgvNqs4NlrHO5qvjWsM":3},{"answer":4,"createTime":5,"id":6,"options":7,"origin":12,"question":15,"related":16,"source":24,"type":44},[],"2026-01-21 09:42:38",1078360644,[8,9,10,11],"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",{"courseImg":13,"courseName":14},"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002Fffd30bd9b171f3bda7487b5e02d8f0f4.jpg","[共享课]基础化学实验1","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( )",[17,26,31,41,45,54,63,68,77,87],{"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":6,"options":43,"question":15,"source":24,"type":44},[],[8,9,10,11],0,{"answer":46,"createTime":5,"id":47,"options":48,"question":53,"source":24,"type":40},[],1078360671,[49,50,51,52],"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":55,"createTime":5,"id":56,"options":57,"question":62,"source":24,"type":44},[],1078360684,[58,59,60,61],"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":64,"createTime":5,"id":65,"options":66,"question":67,"source":24,"type":25},[],1078360726,[21,22],"装柱时,树脂上部应保留1~2 cm高的水",{"answer":69,"createTime":5,"id":70,"options":71,"question":76,"source":24,"type":44},[],1078360744,[72,73,74,75],"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":78,"createTime":79,"id":80,"options":81,"question":86,"source":24,"type":44},[],"2026-01-21 09:42:37",1078360746,[82,83,84,85],"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":88,"createTime":5,"id":89,"options":90,"question":95,"source":24,"type":40},[],1078360752,[91,92,93,94],"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","洗衣粉中的硫酸钠起哪些作用"]