1.2溶液组成的定量表示—2021-2022学年化学鲁教版（五四制）九年级全一册随堂小测
※题型：单选题※知识点：单选题※试题难度：中等<br>将50g20%的氯化钾溶液稀释到200g,稀释后所得溶液中溶质质量分数是( )<br>A.1% B.5 C.10% D.20%<br>答案<br><img src="https://picture2.zhihuicn.com/answer/2/5/2020/7a42b836c3de47feb73c6ca464d00085/76900E09FAB5EBA344B8EA84E844FF07.png"><br>解析<br><img src="https://picture2.zhihuicn.com/explain/2/5/2020/2189e4b468a848ef89da9dd7d74e5be7/B9F27B58894BBB23D0CEF90A3002D117.png"><br><br>※题型：单选题※知识点：单选题※试题难度：中等<br>常温下,对100mL氯化钠饱和溶液进行如图所示实验。下列分析错误的是( )<img src="https://picture2.zhihuicn.com/testImage/2/2020/12/9/4E4D51A3DDF8D8485EA70A9A10809473.png"><br>A.实验1后,甲、乙中溶液的溶质质量分数相等<br>B.实验2后,乙中比甲中氯化钠的溶解度大<br>C.实验2后,甲中溶液为氯化钠的不饱和溶液<br>D.实验2后,甲、乙中溶液所含溶质质量相等<br>答案<br><img src="https://picture2.zhihuicn.com/answer/2/5/2020/fdeafe71343f49589b85ce67adf62960/76900E09FAB5EBA344B8EA84E844FF07.png"><br>解析<br><img src="https://picture2.zhihuicn.com/explain/2/5/2020/2c2a006dd0244bdc9cf6109e04e54813/ACDDF487522502116CCC183CE2E2724A.png"><br><br>※题型：单选题※知识点：单选题※试题难度：较易<br>某同学需要配制50g质量分数为15%的氯化钠溶液,步骤如图所示,下列分析正确的是( )<img src="https://picture2.zhihuicn.com/testImage/2/2021/6/25/A8B78A2EBBCD95A8F0647599CF22A628.png"><br>A.配制过程中出现了两处操作错误<br>B.实验操作步骤为计算、称量、量取、蒸发<br>C.若所有操作都正确,完全溶解后有液滴溅出,会导致溶质的质量分数偏小<br>D.配制时应称量氯化钠固体质量为70g<br>答案<br><img src="https://picture2.zhihuicn.com/answer/2/5/2021/685f99372eb64e128267b8bbb6815fef/E7F0EDF83F40244C8F0C84B97471AED6.png"><br>解析<br><img src="https://picture2.zhihuicn.com/explain/2/5/2021/7d725a925d7840349d60ef5fb94a6f15/06926A74EFC1ECA70B2AFF82C4CF83D6.png"><br><br>※题型：单选题※知识点：单选题※试题难度：较易<br>根据学生实验的需要,实验员蒋老师需要配制500g5%氢氧化钠溶液,其中不必要的步骤是( )<br>A.计算:确定所需要的氢氧化钠和水的质量<br>B.称量:按计算结果称量氢氧化钠的质量,量取水的体积<br>C.溶解:将称量好的氢氧化钠溶解于所量取的水中<br>D.洗涤:将清洗完烧杯的水倒入试剂瓶中<br>答案<br><img src="https://picture2.zhihuicn.com/answer/2/5/2021/c12b9c0eece8473882ae428e8750f2e2/01A39E48B8A67989A23F6887F26FCC64.png"><br>解析<br><img src="https://picture2.zhihuicn.com/explain/2/5/2021/f9639b65925b41f793503642b8d96a36/B3AECA6FD6527759C0CE0DD68D1560EB.png"><br><br>※题型：单选题※知识点：单选题※试题难度：较易<br>用NaOH固体配制200g10%的NaOH溶液,下列装置或操作正确的是( )<br>A.用细口瓶保存NaOH固体<img src="https://picture2.zhihuicn.com/testImage/2/2021/6/24/59D540E0CF5388012C76BBE33F70B06D.png"><br>B.用托盘天平称取NaOH固体<img src="https://picture2.zhihuicn.com/testImage/2/2021/6/24/1B347CD4E615E9923EEDA136280BEF13.png"><br>C.用烧杯溶解NaOH固体<img src="https://picture2.zhihuicn.com/testImage/2/2021/6/24/F5F697BC8DEEB029568F4C8E52CBA279.png"><br>D.用广口瓶存放NaOH溶液<img src="https://picture2.zhihuicn.com/testImage/2/2021/6/24/47433B316B669B4C5A56BD16D9F81BCF.png"><br><br>答案<br><img src="https://picture2.zhihuicn.com/answer/2/5/2021/a4256d4ddec042f190051cbd8e61c63a/06CA09E70C17EF8BA2D3B8C70D693953.png"><br>解析<br><img src="https://picture2.zhihuicn.com/explain/2/5/2021/2ba7b1df2d374c00a034bff4d4ad33a8/F2F1ECEC32310F197E703B9921404EE6.png"><br><br>※题型：单选题※知识点：单选题※试题难度：容易<br>下列对“溶质质量分数为20%的NaCl溶液”的含义解释正确的是( )<br>A.在该溶液中,溶质和溶剂的质量比为1:5<br>B.100g水中含有20gNaCl<br>C.在该溶液中,溶质与溶液的质量比为1:6<br>D.50g该溶液中含有10gNaCl<br>答案<br><img src="https://picture2.zhihuicn.com/answer/2/5/2021/30b91d0e265442d39cfe89ba80aaae0b/01A39E48B8A67989A23F6887F26FCC64.png"><br>解析<br><img src="https://picture2.zhihuicn.com/explain/2/5/2021/f9001e6ee995493c99b2d1b991dee891/E411DE74573F7D0FDED5B6722AB65D39.png"><br><br>
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