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某班甲乙两组同学分别作常见酸和碱与指示剂反应的实验使用的试剂有稀盐酸稀硫酸氢氧化钠溶液和酚酞试液．实验后废液分别集中到各组的一个废液缸 Template






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tomski某班甲乙两组同学分别作常见酸和碱与指示剂反应的实验使用的试剂有稀盐酸稀硫酸氢氧化钠溶液和酚酞试液．实验后废液分别集中到各组的一个废液缸 coloring
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为了探究酵母菌细胞吸的方式，某同学将实验材料和用具按如图所示安装好。以下关于该实验的说法，不正确的是 A．甲、乙两组实验探究的分别是 sketch template
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某班甲乙两组同学分别作常见酸和碱与指示剂反应的实验使用的试剂有稀盐酸稀硫酸氢氧化钠溶液和酚酞试液．实验后废液分别集中到各组的一个废液缸 sketch template
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某校课外小组模拟工业制备纯碱并测定纯碱的纯度甲乙两组同学分别进行了下列相关实验．1写出碳酸氢钠受热分解的化学方程式2NaHCO3 sketch template
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17．某有机物在氧气中充分燃烧后产物只有二氧化碳和水甲乙两组同学分别用AB两种方法测定它的组成请你分析选用的实验装置是 推测出该 sketch template
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17．某有机物在氧气中充分燃烧后产物只有二氧化碳和水甲乙两组同学分别用AB两种方法测定它的组成请你分析选用的实验装置是 推测出该 sketch template
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某校课外小组模拟工业制备纯碱并测定纯碱的纯度甲乙两组同学分别进行了下列相关实验．1已知碳酸氢钠受热分解生成碳酸钠水和CO2由碳酸氢 sketch template
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在做“观察水沸腾 的实验时甲乙丙三组同学分别从AB两套器材中任选一套来完成实验．实验室已准备多套AB装置1甲乙两组同学用 sketch template
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在探究“水的沸腾 的实验中甲乙两组同学分别使用AB两套装置来完成实验．1安装实验器材时应按照自下而上选填“自上而下 或“自下而上 sketch template
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化学兴趣小组同学在进行“碱的性质 探究实验过程中甲乙两组同学分别相同体积的石灰水和烧碱溶液中同时通入CO2气体前者变浊后者未见明显 sketch template
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实验室有4瓶没有标签的无色溶液甲乙两组同学对溶液的鉴别进行了探究．1据老师说这4瓶无色溶液可能是Na2CO3CuSO4NaOH sketch template
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甲、乙两位同学分别按如图所示装置进行了探究活动。请回答相关问题： sketch template
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如图甲某同学将稀盐酸滴入氢氧化钠溶液中生反应，图乙是该反应的微观粒子示意图。下列关于酸和碱反应的说法中，合理的是（ sketch template
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题目为研究海水提溴工艺甲乙两同学分别设计了如下实验流程甲 乙 1甲乙两同学在第一阶段得到含溴海水中氯气的利用率较高的是 sketch template
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甲乙两组同学探究属的化学性质做了以下实验甲组铁丝在氧气中燃烧 锌与稀硫酸反应 铝丝与硫酸铜溶液反应乙组探究铁的锈蚀条件1 sketch template
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某校甲乙两个兴趣小组对实验室一瓶敞口放置的氢氧化钠固体进行探究探究一氢氧化钠固体是否变质兴趣小组同学取量氢氧化钠固体样品于试管中加 sketch template
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某有机物44g在氧气中充分燃烧生成132g二氧化碳和72g水．由此可确定该物质是由 元素组成的如果该物质的相对分子质量是44该物质 sketch template
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题目实验室中有甲乙两瓶过氧化氢溶液均标有“10% 字样相同条件下用这两瓶过氧化氢溶液制取150mL氧气所用时间明显不同对此 sketch template
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甲乙两组同学分别做常见酸和碱与指示剂反应的实验使用试剂有稀盐酸稀硫酸氢氧化钠溶液．实验后废液分别集中到各组的一个废液缸中．研究小组对 sketch template
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题目1下图是abc三种物质溶解度曲线a与c溶解度曲线相交于P点据图回答P点的含义是 t2℃时30g A物质加入到50g sketch template
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8．甲乙两同学分别作了按中学化学教书描述的用注射器说明压强对化学平衡影响的实验但稍作改进他们不约而同地按如图所示的装置同时用两个注射器 sketch template
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下列二氧化碳的用途既与它的物理性质有关又与它的化学性质有关的是 A．制成干冰B．作气体肥料C．制化工产品D．用于灭火 题目和参考答案 sketch template
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氧化钙、氢氧化钙变质 Word文档在线阅读与下载 免费文档 sketch template
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某兴趣小组的同学们以“稀硫酸与氢氧化钠溶液能否生反应 为课题进行了学探究 同学们在烧杯中加入10mL稀硫酸滴入几滴酚酞试液接着分两次 sketch template
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某研究性学习小组设计了一组实验来探究元素期律甲同学根据元素非属性与对应最高价含氧酸之间的关系设计了如图装置来一次性完成NCSi的非 sketch template
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题目制备纯净的液态无水四氯化锡SnCl4易挥形成气体极易生水解的反应为Sn 2Cl2 SnCl4 Sn也可与HCl反应生成 sketch template
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某研究性学习小组设计了一组实验来探究元素期律．甲同学设计了如图1装置来一次性完成验证非属性S＞C＞Si的实验研究乙同学设计了如图 sketch template
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某研究性学习小组设计了一组实验来探究元素期律甲同学根据元素非属性与对应最高价含氧酸之间的关系设计了如图1装置来一次性完成同主族元素碳与 sketch template
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等质量的MgAlZn三种属分别与足量的稀H2SO4反应生成氢气质量分别是m1m2m3则三者关系是 A．m1=m2=m3B sketch template
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右图是常见酸碱盐之间的相互转化关系．1写出图中相应物质的化学式酸H2SO4碱BaOH2．2写出图中反应和的化学方程式 sketch template
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将AsO43 2I 2H AsO33 I2 H2O设计成如图所示的电化学装置其中C1C2均为石墨棒．甲乙两组同学分别进行下述操作 sketch template