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回答下列和“守恒”有关的问题. 若配制196g溶质质量分数为20%的稀硫酸,需要98%的浓硫酸的质量,根据 守恒,列示为196g×20%=98%·X;在稀释浓硫酸的操作中,除了需要量筒和胶头滴...
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教案备课库《寒假作业——酸碱盐综合1》真题及答案
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下图是某同学配制一定溶质质量分数NaCl溶液的实验操作示意图据图回答下列问题1用图中数字序号表示配制
实验室欲配制溶质质量分数4%的NaOH溶液200g需水的质量为
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如图是某同学配制一定溶质质量分数N.aC.l溶液的实验操作示意图据图回答下列问题1用图中数字序号表示
取某碳酸钠样品放入烧杯中加入95.8g水充分溶解再向其中加入稀硫酸反应放出气体的总质量与所加入稀硫酸
回答下列和守恒有关的问题.配制196g质量分数20%的稀硫酸需98%浓硫酸的质量根据不变列式为196
某同学欲配制稀硫酸用于实验室制取氢气请回答下列相关问题.若配制196g溶质质量分数为20%的稀硫酸需
将硫酸钠和氢氧化钠固体混合物20g加入到196g质量分数为10%的稀硫酸中恰好完全反应求反应后所得溶
实验室可用锌与稀硫酸反应制取氢气.现有某同学用足量的锌与196g溶质质量分数为10%的稀硫酸反应可
将14.6g已部分氧化的锌粉加入到196g10%的稀硫酸中恰好完全反应.则所得溶液中溶质的质量为
19g
30.1g
32.2g
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某同学欲配制稀硫酸用于实验室制取氢气请回答下列相关问题.1若配制196g溶质质量分数为20%的稀硫酸
有未知溶质质量分数的氢氧化钠溶液50g取出10g与27g质量分数为10%的氯化铜溶液恰好完全反应所余
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取某碳酸钠样品放入烧杯中加入95.8g水充分溶解再向其中加入稀硫酸反应放出气体的总质量与所加入稀硫酸
如图是某同学配制一定溶质质量分数N.aC.l溶液的实验操作示意图据图回答下列问题1用图中数字序号表示
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街头上有许多便宜的黄金饰品出售实际上它们不是黄金而是铜锌合金因其具有较好的机械性能和光泽度所以常被做
取某碳酸钠样品放入烧杯中加入95.8g水充分溶解再向其中加入稀硫酸反应放出气体的总质量与所加入稀硫酸
取某碳酸钠样品放入烧杯中加入95.8g水充分溶解再向其中加入稀硫酸反应放出气体的总质量与所加入稀硫酸
将硫酸钠和氢氧化钠固体混合物20g加入到196g质量分数为10%的稀硫酸中恰好完全反应.求反应后所
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