3.2溶液组成的定量表示—2021-2022学年化学鲁教版九年级上册随堂小测
※题型：单选题※知识点：单选题※试题难度：中等<br>对“10%的氯化钠溶液”含义的解释错误的是( )<br>A.100g氯化钠溶液中溶解了10g氯化钠<br>B.100g水中溶解了10g氯化钠<br>C.将10g氯化钠溶解于90g水中得到的溶液<br>D.溶液中氯化钠与水的质量比为1:9<br>答案<br><img src="https://picture2.zhihuicn.com/answer/2/5/2020/83ca6b025b1b480db6383f571cdbd7c9/76900E09FAB5EBA344B8EA84E844FF07.png"><br>解析<br><img src="https://picture2.zhihuicn.com/explain/2/5/2020/d3a00a3341764cfa870647f50348a14d/1200353D0D2CA856693D3E7C8BD7AB8B.png"><br><br>※题型：单选题※知识点：单选题※试题难度：较易<br>配制20%的氯化钠溶液时,会造成所配溶液中氯化钠的质量分数偏大的是( )<br>A.用量筒量取水时俯视读数<br>B.转移已配好的溶液时,有少量液体溅出<br>C.氯化钠晶体不纯(杂质难溶于水)<br>D.烧杯用蒸馏水润洗后,再配制溶液<br>答案<br><img src="https://picture2.zhihuicn.com/answer/2/5/2021/e11d9c0ced9046fcaf79af40b2d0293b/E7F0EDF83F40244C8F0C84B97471AED6.png"><br>解析<br><img src="https://picture2.zhihuicn.com/explain/2/5/2021/6e45f313b8524f08a3cbe13c6170846e/CA436EA28CADE7CDB76351C55242753D.png"><br><br>※题型：单选题※知识点：单选题※试题难度：较易<br>若将某溶液的溶质质量分数增大一倍,可采用的方法是(设均未有晶体析出)( )<br>A.将溶剂蒸发掉一半<br>B.将溶液倒出一半<br>C.将溶质的质量增加一倍<br>D.蒸发溶剂的质量为原溶液质量的一半<br>答案<br><img src="https://picture2.zhihuicn.com/answer/2/5/2021/843e2883ea554ecbbb891f9ddcc925d4/01A39E48B8A67989A23F6887F26FCC64.png"><br>解析<br><img src="https://picture2.zhihuicn.com/explain/2/5/2021/6030c37d5cdf40b19126888e3366c84d/47105E4D50B5312BA443631189FCC3C0.png"><br><br>※题型：单选题※知识点：单选题※试题难度：较易<br>如图为配制一定质量分数的氯化钠溶液的操作过程图示。配制该溶液的正确实验操作顺序是( )<img src="https://picture2.zhihuicn.com/testImage/2/2021/6/25/3F43695232A5F0D8912DF3078ED99E83.png"><br>A.①②③④⑤⑥ B.⑥⑤④③②①<br>C.④⑤②①⑥③ D.④⑤①②③⑥<br>答案<br><img src="https://picture2.zhihuicn.com/answer/2/5/2021/9e033fc34fdf4ea5b40a6af8b79d86cc/06CA09E70C17EF8BA2D3B8C70D693953.png"><br>解析<br><img src="https://picture2.zhihuicn.com/explain/2/5/2021/b433e9ebc14949e78dc0b0dd720c0d32/858F811E0D5C69017E94CB99BCFBEB07.png"><br><br>※题型：单选题※知识点：单选题※试题难度：中等<br>汽车、电动车一般使用铅酸蓄电池,某铅酸蓄电池用的是28%的稀硫酸,现要用1.0kg98%的浓硫酸配制该稀硫酸,则需加水( )<br>A.0.5kg B.1.5kg C.2.5kg D.3.5kg<br>答案<br><img src="https://picture2.zhihuicn.com/answer/2/5/2021/09366a97600f41ed865bfa9919aac37d/06CA09E70C17EF8BA2D3B8C70D693953.png"><br>解析<br><img src="https://picture2.zhihuicn.com/explain/2/5/2021/37743428947944c9ac936a1dc21aba35/DA2700B837511CD749301859229E78B6.png"><br><br>※题型：单选题※知识点：单选题※试题难度：中等<br>在实验室欲将80g溶质质量分数为25%的蔗糖溶液浓度增大至40%,简单易行的方法是( )<br>A.再溶解20g蔗糖 B.恒温蒸发25mL水<br>C.再溶解40g蔗糖 D.恒温蒸发40mL水<br>答案<br><img src="https://picture2.zhihuicn.com/answer/2/5/2021/37c1073f4e58403c8d2ccc2c0dabeed6/E7F0EDF83F40244C8F0C84B97471AED6.png"><br>解析<br><img src="https://picture2.zhihuicn.com/explain/2/5/2021/76b0ebf7395f4106922da75a2ba51625/4E2D9771C4F241C86C4218BD88FF8D99.png"><br><br>※题型：单选题※知识点：单选题※试题难度：中等<br>在20℃时,从200g饱和硝酸钾溶液中取出5g溶液,剩余的溶液与原溶液比较,下列有关量中没有变化的是( )<br>①溶质的质量②溶剂的质量③溶液的密度④溶质质量分数A.①② B.③④ C.②③ D.①④<br>答案<br><img src="https://picture2.zhihuicn.com/answer/2/5/2021/ec1c3d81f9414b88a08bf54d35e722c1/76900E09FAB5EBA344B8EA84E844FF07.png"><br>解析<br><img src="https://picture2.zhihuicn.com/explain/2/5/2021/45e24037d6e349839726c65b0f6775ab/E8F9C19D77EE428259B693E24FE64E3D.png"><br><br>※题型：计算题※知识点：计算题※试题难度：中等<br>一定温度下,将<br>80g<br>氯化钠固体放入盛有<br>200g<br>水的烧杯中,充分搅拌后,尚有<br>8g<br>氯化钠未溶解,则形成的氯化钠溶液中溶质的质量分数是多少?(保留<br>位小数)<br><br>答案<br><img src="https://picture2.zhihuicn.com/answer/2/5/2020/59e086a30f2d4107936fe02d1e6b3ed4/0032BF78149F18FDC4AEE03EEDE28906.png"><br>解析<br>略<br>
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