2018年中考化学真题分类汇编1物质的构成和变化考点4溶液6溶液的配制3实验仪器和操作1实验操作图(无答案).doc

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2018年中考化学真题分类汇编1物质的构成和变化考点4溶液6溶液的配制3实验仪器和操作1实验操作图(无答案).doc_第1页
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1溶液(18 滨州)11、小芳在配制一定溶质质量分数的氯化钠溶液时,没有按照正确的称量氯化钠。量取水的操作规程进行操作(图示为小芳操作时的读数,其它操作都正确) 。小芳实际配制的氯化钠溶液的溶质质量分数(水的密度为 1g/cm3)约为A.12.4% B.17.2% C.16.9% D.12.5%(18 自贡)21.(6 分)某同学配制 50g9%化的氯化钠溶液,整个操作过程如图所示,回答下列问题:2(1)配制溶液的正确操作顺序为_(填序号),其中操作错误的是_ (填序号)(2)图中盛放氯化钠固体的仪器名称是_,需称取氧化钠_ g。(3)量水时选用的量筒的量程最合适的是_(填字母),读数时视线要与量筒内_保持水平。A.10mL B.25mL C.50mL D.100mL(18 泰安)(1)利用下图进行粗盐中难溶性杂质去除和配制一定质量分数氯化纳溶液的实验。相盐中难溶性杂质去除的主要操作顺序是_(填字母序号);配制 11%的氯化钠溶液 100g。如按下图进行称量和量取,其它操作均规范无误,最终导致配制的氯化钠溶液的溶质质量分数_(填“大于”、“小于”或”不能确定”)11%。

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