湖北省宜昌市2019届九年级下学期期中调研考试化学试卷
※题型：单选题※知识点：单选题※试题难度：较易<br>下列物质不是表示同一物质的一组是( )<br>A.火碱、烧碱、苛性钠、氢氧化钠<br>B.纯碱、苏打、碳酸钠<br>C.熟石灰、消石灰、氧化钙<br>D.小苏打、碳酸氢钠<br>答案<br><img src="https://picture2.zhihuicn.com/answer/2/5/2021/ba4d37c23daa4ccab32d040b6f5898be/06CA09E70C17EF8BA2D3B8C70D693953.png"><br>解析<br><img src="https://picture2.zhihuicn.com/explain/2/5/2021/d0e59259262845a6bb9cc4df22ddbf80/C33DF8A2ECBF6A32E0FA55D1599B9249.png"><br><br>※题型：单选题※知识点：单选题※试题难度：较易<br>要改正下列错误的操作,不需要再补充仪器的是( )<br>A.<img src="https://picture2.zhihuicn.com/testImage/2/2021/3/4/08295F3CCA80ADF2DE3CDA49E98B1A04.png"><br>B.<img src="https://picture2.zhihuicn.com/testImage/2/2021/3/4/28BBE1A03944B135786C061CD1DD634E.png"><br>C.<img src="https://picture2.zhihuicn.com/testImage/2/2021/3/4/B2169FA4488829C6A915E2F6CB57F99A.png"><br>D.<img src="https://picture2.zhihuicn.com/testImage/2/2021/3/4/871ED21ED788F3D29C87E0259A2E2CEE.png"><br><br>答案<br><img src="https://picture2.zhihuicn.com/answer/2/5/2021/7aca7d6b4d3340498b770244bf1fe643/E7F0EDF83F40244C8F0C84B97471AED6.png"><br>解析<br><img src="https://picture2.zhihuicn.com/explain/2/5/2021/7efd172b8cd94fa3b30b938c64238b7a/A1E29478E88FBF6445DAD9B260CD1860.png"><br><br>※题型：单选题※知识点：单选题※试题难度：容易<br>下列符号既能表示一种元素又能表示一个原子,还表示一种单质的是( )<br>A.<img src="https://picture2.zhihuicn.com/testImage/2/2021/3/4/F9EEF40E95F5DCDB29C79A9447E02C4B.png"><br>B.He<br>C.CO<br>D.O<br>答案<br><img src="https://picture2.zhihuicn.com/answer/2/5/2021/a083144096d3447a9b54b49da93e29df/76900E09FAB5EBA344B8EA84E844FF07.png"><br>解析<br><img src="https://picture2.zhihuicn.com/explain/2/5/2021/4145d18759a44bf19a7708f3333b945b/35B4634FAA5FDC3C95FC2E25989B1657.png"><br><br>※题型：单选题※知识点：单选题※试题难度：中等<br>土壤的酸碱性会影响农作物的生长。某地区由于受酸雨影响,所以土壤呈酸性,从土壤的酸碱性角度考虑,不宜种植的农作物是( )<br><tbody><br>农作物<br>茶树<br>油菜<br>西瓜<br>甘草<br>适宜pH范围<br>4.5~5.5<br>5.8~6.7<br>6.0~7.0<br>7.2~8.5<br></tbody><br>A.茶树 B.油菜 C.西瓜 D.甘草<br>答案<br><img src="https://picture2.zhihuicn.com/answer/2/5/2021/30eb6c2151324db3bf9d50c81cc1cf64/01A39E48B8A67989A23F6887F26FCC64.png"><br>解析<br><img src="https://picture2.zhihuicn.com/explain/2/5/2021/5f805b2593ce45b19a9aebaf3c5c04b1/FD8C961BA22D6EAF68AB8E0699435520.png"><br><br>※题型：单选题※知识点：单选题※试题难度：较易<br>人体结石有多种,其中一种含有较多的草酸钙(<img src="https://picture2.zhihuicn.com/testImage/2/2021/3/4/1CCF0F7C25D24D49903C42D06A40CDC6.png"><br>),<img src="https://picture2.zhihuicn.com/testImage/2/2021/3/4/1CCF0F7C25D24D49903C42D06A40CDC6.png"><br>中碳元素的化合价是( )<br>A.+1 B.+2 C.+3 D.+4<br>答案<br><img src="https://picture2.zhihuicn.com/answer/2/5/2021/8a3c9d49b34f49f29dcda6d53a3f9b26/06CA09E70C17EF8BA2D3B8C70D693953.png"><br>解析<br><img src="https://picture2.zhihuicn.com/explain/2/5/2021/0a454d9c3af44c7fbae1f38c4f8c1dd2/1D894A4D06802DEC400A4641E245F762.png"><br><br>※题型：多选题※知识点：多选题※试题难度：中等<br>分别向a、b两支试管中加入形状和大小完全相同的铁片,再向a中加入植物油,均塞上橡皮塞,U形玻璃管内为红墨水(开始时两端液面水平),如图所示。放置一段时间后,以下说法错误的是( )。<img src="https://picture2.zhihuicn.com/testImage/2/2021/1/15/AF80D849BE9B4B3784A49337D6A637E3.png"><br>A.植物油用于隔绝氧气和水<br>B.两支试管中铁片均被腐蚀<br>C.U形玻璃管两端的液面变为右低左高<br>D.U形玻璃管两端的液面变为左低右高<br>答案<br><img src="https://picture2.zhihuicn.com/answer/2/5/2021/46fa91cf4d5346889a1b260f951a032a/DED0EF50CCECB5AC708154DA3F19061B.png"><br>解析<br><img src="https://picture2.zhihuicn.com/explain/2/5/2021/f0f387aa1ac44eccaaf87678aace467e/DC6B4409D6199CDC1EABE2AA833B1A10.png"><br><br>※题型：单选题※知识点：单选题※试题难度：较易<br>下列处理方法不正确的是( )<br>A.炒菜时油锅中的油不慎着火,可用锅盖盖灭<br>B.扑灭森林火灾的有效方法之一是将大火蔓延路线前的一片树木砍掉,形成隔离带<br>C.不慎碰倒酒精灯,酒精在桌面上燃烧起来,应立即用水浇灭<br>D.遇到火灾时,可用湿毛巾捂住口鼻,蹲下靠近地面或沿墙壁跑离着火区域<br>答案<br><img src="https://picture2.zhihuicn.com/answer/2/5/2021/c0f9556bc72b46f3a16b4947c5d6d247/06CA09E70C17EF8BA2D3B8C70D693953.png"><br>解析<br><img src="https://picture2.zhihuicn.com/explain/2/5/2021/a3514773c5b1441aac3600aa0eace676/149C29B6549BF811E93D75121878F6DF.png"><br><br>※题型：单选题※知识点：单选题※试题难度：中等<br>最近科学家经过确认,存在一种化学式为<img src="https://picture2.zhihuicn.com/testImage/2/2021/3/5/2FDE22EB2593DA7212B4AFCA24614ACA.png"><br>的分子,这一发现可能开辟世界能源的新领域,它可能成为我国未来发射火箭的一种新型燃料,下列关于N5的说法正确的是( )<br>A.<img src="https://picture2.zhihuicn.com/testImage/2/2021/3/5/2FDE22EB2593DA7212B4AFCA24614ACA.png"><br>是一种化合物<br>B.<img src="https://picture2.zhihuicn.com/testImage/2/2021/3/5/2FDE22EB2593DA7212B4AFCA24614ACA.png"><br>分子是由氮元素组成的<br>C.<img src="https://picture2.zhihuicn.com/testImage/2/2021/3/5/2FDE22EB2593DA7212B4AFCA24614ACA.png"><br>中氮元素显零价<br>D.<img src="https://picture2.zhihuicn.com/testImage/2/2021/3/5/2FDE22EB2593DA7212B4AFCA24614ACA.png"><br>这种物质是由5个氮原子构成的.<br>答案<br><img src="https://picture2.zhihuicn.com/answer/2/5/2021/74387d35e31f45249a03e35d85105def/06CA09E70C17EF8BA2D3B8C70D693953.png"><br>解析<br><img src="https://picture2.zhihuicn.com/explain/2/5/2021/77bcf3980f9f4cfd98a010024f4d5993/703DE40BB08007F2FC8B635A7DB65E46.png"><br><br>※题型：单选题※知识点：单选题※试题难度：中等<br>甲和乙在一定条件下反应生成丙和丁。结合微观示意图分析,下列结论正确的是( )<img src="https://picture2.zhihuicn.com/testImage/2/2021/3/5/51A6897C44CBFC15147608D45F23AC54.png"><br>A.发生反应的甲和乙的质量比为22︰3<br>B.甲中碳元素的化合价为+2<br>C.生成的丙和丁的分子个数比为2︰1<br>D.该反应类型为置换反应<br>答案<br><img src="https://picture2.zhihuicn.com/answer/2/5/2021/b1276004483a4831b79500d8ebbd2be3/E7F0EDF83F40244C8F0C84B97471AED6.png"><br>解析<br><img src="https://picture2.zhihuicn.com/explain/2/5/2021/c95ee4b5343f447fa070e5b0e3527912/8E9EA4C0B9AA1187E20497DB2EB22021.png"><br><br>※题型：单选题※知识点：单选题※试题难度：中等<br>下列各组物质分别加入到足量的水中,最终能得到无色、透明溶液的是( )<br>A.<img src="https://picture2.zhihuicn.com/testImage/2/2021/3/5/EE33896DE4716EF7771F66B603E4B626.png"><br>B.<img src="https://picture2.zhihuicn.com/testImage/2/2021/3/5/CAFD854D28319DEA8CC61997312DD472.png"><br>C.<img src="https://picture2.zhihuicn.com/testImage/2/2021/3/5/20E0F2CC2668473D991627F9845140CF.png"><br>D.<img src="https://picture2.zhihuicn.com/testImage/2/2021/3/5/DF4814C021EA6C000A398E3FAA42CA9C.png"><br><br>答案<br><img src="https://picture2.zhihuicn.com/answer/2/5/2021/aa476333e22b49fb858fa68bfd419ab0/76900E09FAB5EBA344B8EA84E844FF07.png"><br>解析<br><img src="https://picture2.zhihuicn.com/explain/2/5/2021/f325e79685ec40a88977dd54907c92c3/955B5CF303A099789869577A7B214EF9.png"><br><br>※题型：单选题※知识点：单选题※试题难度：中等<br>下列选项中,除杂试剂或方法不正确的是( )<br><tbody><br>选项<br>物质<br>杂质<br>除杂试剂或方法<br>A<br>KCl<br><img src="https://picture2.zhihuicn.com/testImage/2/2021/3/5/19DB00263A67B64F8C686CD794139E8F.png"><br>溶解、过滤、蒸发<br>B<br>NaCl<br><img src="https://picture2.zhihuicn.com/testImage/2/2021/3/5/049D802E7350A56DC61AAD18655E5681.png"><br>加入适量稀硫酸、蒸发<br>C<br>Cu<br>CuO<br>加入足量稀盐酸、过滤<br>D<br>CaO<br><img src="https://picture2.zhihuicn.com/testImage/2/2021/3/5/C33BDE800D867632B103C25FB2DA0A2F.png"><br>高温煅烧<br></tbody><br>A.A B.B C.C D.D<br>答案<br><img src="https://picture2.zhihuicn.com/answer/2/5/2021/6616ce19381144368ab5724e9278cfcc/76900E09FAB5EBA344B8EA84E844FF07.png"><br>解析<br><img src="https://picture2.zhihuicn.com/explain/2/5/2021/744d42a38f95431e8964012adb14a5e5/FA0492590A17F8F25923B2D79BF8F3EF.png"><br><br>※题型：单选题※知识点：单选题※试题难度：较易<br>X、Y、Z有如图所示的转化(“→”表示反应一步实现,部分物质和反应条件已略去),则符合要求的X、Y、Z依次为( )<img src="https://picture2.zhihuicn.com/testImage/2/2021/3/5/F829EE750554BE125ABF416CFCE24874.png"><br>A.Cu、CuO、<img src="https://picture2.zhihuicn.com/testImage/2/2021/3/5/37665690298015D30B54C29AD1E95721.png"><br>B.C、CO、<img src="https://picture2.zhihuicn.com/testImage/2/2021/3/5/FB0FEA1A772324307D17386FE5E24D6C.png"><br>C.CaO、<img src="https://picture2.zhihuicn.com/testImage/2/2021/3/5/37665690298015D30B54C29AD1E95721.png"><br>、<img src="https://picture2.zhihuicn.com/testImage/2/2021/3/5/C33BDE800D867632B103C25FB2DA0A2F.png"><br>D.<img src="https://picture2.zhihuicn.com/testImage/2/2021/3/5/A38DD3D9BA8BC69EB7933E4CB07531B2.png"><br><br>答案<br><img src="https://picture2.zhihuicn.com/answer/2/5/2021/eccaf6096d29402f82b3547dab447823/06CA09E70C17EF8BA2D3B8C70D693953.png"><br>解析<br><img src="https://picture2.zhihuicn.com/explain/2/5/2021/a801afb67d9a4976a961dcdf0e6427b8/AB8080B003C68DF9AB3DC9B9975FFBBE.png"><br><br>※题型：单选题※知识点：单选题※试题难度：中等<br>在氯化铜和氯化亚铁的混合溶液中加入一定量的镁粉,充分反应后过滤,向滤出的固体中滴加稀盐酸,有气泡产生.下列判断正确的是( )<br>A.滤出的固体中一定含有铜、铁、镁<br>B.滤出的固体一定含有铜,可能含有铁和镁<br>C.滤液中一定含有氯化镁,可能含有氯化亚铁,一定不含有氯化铜<br>D.滤液中一定含有氯化镁、氯化亚铁、氯化铜<br>答案<br><img src="https://picture2.zhihuicn.com/answer/2/5/2021/c7350528c8e94cdb972dd0200aebec1f/06CA09E70C17EF8BA2D3B8C70D693953.png"><br>解析<br><img src="https://picture2.zhihuicn.com/explain/2/5/2021/edb0c60593374cec9570b6733a58127c/FCE4C741DB0B5881328795D33522ED51.png"><br><br>※题型：单选题※知识点：单选题※试题难度：中等<br>下列知识整理的内容完全正确的一组是( )<br><tbody><br>A.除杂的方法<br>B.物质与俗名<br>铜粉中混有铁粉﹣﹣﹣用磁铁充分吸引<img src="https://picture2.zhihuicn.com/testImage/2/2021/3/5/6BDB1014D82326205B4B98A5F45BC619.png"><br>溶液中混有<img src="https://picture2.zhihuicn.com/testImage/2/2021/3/5/6F534987C23C520E13822FA926969555.png"><br>﹣﹣﹣加过量的铁粉<img src="https://picture2.zhihuicn.com/testImage/2/2021/3/5/C33BDE800D867632B103C25FB2DA0A2F.png"><br>中混有NaCl﹣﹣﹣加足量水溶解后过滤<br>氧化钙﹣﹣﹣生石灰氢氧化钠﹣﹣﹣纯碱氢氧化钙﹣﹣﹣消石灰<br>C.性质与用途<br>D.食品与安全<br>取暖防中毒﹣﹣﹣煤炉上放一壶水防菜刀生锈﹣﹣﹣干燥后悬挂延长食物保质期﹣﹣﹣放入冰箱中<br>亚硝酸钠﹣﹣﹣不能当食盐用霉变食物﹣﹣﹣高温消毒后可食用甲醛溶液﹣﹣﹣可作食品保鲜剂<br></tbody><br>A.A B.B C.C D.D<br>答案<br><img src="https://picture2.zhihuicn.com/answer/2/5/2021/584e914215a544ba8ed55643561a3612/E7F0EDF83F40244C8F0C84B97471AED6.png"><br>解析<br><img src="https://picture2.zhihuicn.com/explain/2/5/2021/a6045bb1ae1548fc908d49a047469e03/9669959671B11BC87BF50810A021A91B.png"><br><br>※题型：填空题※知识点：填空题※试题难度：容易<br>写出下列化学符号<br>:2<br>个氢原子<br>_____<br>;<br>个铵根离子<br>_____<br>;<br>锌<br>元素显<br>+2<br>价<br>_____<br>;<br>个亚铁离子<br>_____<br><br>答案<br><img src="https://picture2.zhihuicn.com/answer/2/5/2021/4f954612368447f4a563907716a7904a/6044122261E2301FED93DC7DA98E73A6.png"><br>解析<br><img src="https://picture2.zhihuicn.com/explain/2/5/2021/8a2671d821b74bf4ace8abd2e81b9a17/06DD1718994C6648CBBE18129EB2E567.png"><br><br>※题型：实验题※知识点：实验题※试题难度：较易<br>完成下列化学方程式:<br>1.镁在空气中燃烧:_____;<br>2.检验二氧化碳的化学方程式:_____;3.用盐酸除铁锈_____。<br>答案<br><img src="https://picture2.zhihuicn.com/answer/2/5/2021/14e51815f2e742c9a87cd5d586b74e26/22E39C4228D0171C33986242E8AD6619.png"><br>解析<br><img src="https://picture2.zhihuicn.com/explain/2/5/2021/f47cac6d5dc343558f27041a82d4fee8/1BCCC9A8C52BD2E9A60CEA5B89D19F28.png"><br><br>※题型：问答题※知识点：问答题※试题难度：中等<br>溶液与人们的生活息息相关,而水是一种最常用的溶剂。<br><img src="https://picture2.zhihuicn.com/testImage/2/2021/3/5/E1D8B5C21C301609781E7C2AAD12A7D3.png"><br>1.小明要净化收集的雨水,自制了一个简易净水器(如图①所示),其中小卵石、石英沙和膨松棉的作用是_____,活性炭的作用是_____。生活中要降低水的硬度,可以采取_____的方法。<br>2.图②中A连接电源的_____(填“正极”或“负极”)。该反应的化学方程式为_____。<br>答案<br><img src="https://picture2.zhihuicn.com/answer/2/5/2021/43c6d3f8a50a494698bb11a862b272c0/2327D1A8BD027EBC7DEE5AAE1EFE3D50.png"><br>解析<br><img src="https://picture2.zhihuicn.com/explain/2/5/2021/79cfc61d88dd4101833e1fe6a2894deb/9E880B93E974E297B341353844B8DAC1.png"><br><br>※题型：问答题※知识点：问答题※试题难度：中等<br>回答下列问题:<br>1.有的胃病患者胃酸过多,常服用一些含氢氧化铝的药物,有关反应的化学方程式为_____。<br>2.铷(Rb)是一种银白色蜡状金属,质软而轻,其化学性质比钾活泼。下图表示铷元素的_____(填“原子”、“阳离子”或“阴离子”)结构示意图。由图可知,铷元素应位于元素周期表中的第_____周期,硫酸铷的化学式为_____。<img src="https://picture2.zhihuicn.com/testImage/2/2021/3/5/E38C9BD789917DD5DC76D1A82A824BEB.png"><br> 3.为维护食品安全,卫生部禁止在面粉中添加增白剂,如过氧化钙(<img src="https://picture2.zhihuicn.com/testImage/2/2021/3/5/897E1D6CB386DC721126DA6C1994DD81.png"><br>)等。它和水反应能生成一种碱和一种无色能供给人呼吸的气体,该反应的化学方程式是_____。<br>答案<br><img src="https://picture2.zhihuicn.com/answer/2/5/2021/bb743a8df23342b781048cc6b5deb670/54F2747E2D4AF91F860AAAAF42EA3406.png"><br>解析<br><img src="https://picture2.zhihuicn.com/explain/2/5/2021/b858053e3f274cb6b307c65c3299297b/3168318D4DCAD956B923FCD40F8873A4.png"><br><br>※题型：实验题※知识点：实验题※试题难度：中等<br>实验室模拟工业炼铁的装置图如下图所示。<br><img src="https://picture2.zhihuicn.com/testImage/2/2021/3/5/CC1A493207C7BCAD5BF89FF963FB2190.png"><br>写出一氧化碳与氧化铁反应的化学方程式<br>_____<br>,硬质玻璃管中的现象是<br>_____<br><br>答案<br><img src="https://picture2.zhihuicn.com/answer/2/5/2021/b5031cb148af4d7897e9ae7bbfa73bd5/DF84481DD5371371825C727A94161F99.png"><br>解析<br><img src="https://picture2.zhihuicn.com/explain/2/5/2021/976dba9648144804b6b9acf572c48f1b/98F73319B511B363911245C399243798.png"><br><br>※题型：实验题※知识点：实验题※试题难度：中等<br>实验室常用下列装置制取气体,我能根据所学知识回答下列问题。<br><img src="https://picture2.zhihuicn.com/testImage/2/2021/3/5/6E313E9100D15D1E9B0A84EAA51A524D.png"><br>1.用A装置制取某种气体的一个化学方程式为_____。<br>2.实验室用过氧化氢溶液和二氧化锰粉末混合制取氧气,反应的化学方程式为_____,我不选B而选用C做气体发生装置,其优点是_____。3.汽车尾气中的一氧化氮是一种大气污染物。它是一种无色气体,难溶于水,密度比空气略大,在空气中能与氧气迅速反应生成红棕色的二氧化氮气体。实验室中制取一氧化氮采用的收集装置是(填序号)_____。我认为选择气体收集方法,从气体性质的角度需要考虑的因素是:_____,_____。4.在医院里给病人输氧时,在氧气钢瓶和病人吸氧器之间连接一个类似如图所示的装置,在装置中盛放大约半瓶蒸馏水,导气管_____(填“a”或“b”)端连接在供氧气的钢瓶上,该装置的作用有(填写一条)_____。<img src="https://picture2.zhihuicn.com/testImage/2/2021/3/5/CD09E777937F6EC35ADE9630F7F0A636.png"><br><br>答案<br><img src="https://picture2.zhihuicn.com/answer/2/5/2021/7e37eb6a63044461aa17330a4d235289/4E3BC7ADFE3981DD80851670A3196BEF.png"><br>解析<br><img src="https://picture2.zhihuicn.com/explain/2/5/2021/6e40207ce9b24702b06ec4b48945441b/77DF6F33A33524058A624E55CB8C2412.png"><br><br>※题型：问答题※知识点：问答题※试题难度：中等<br>图甲、乙、丙三种固体物质的溶解度曲线,请回答下列问题<br><img src="https://picture2.zhihuicn.com/testImage/2/2021/3/5/52F7ACB5984C084E2DDC282CD3F639BA.png"><br>1.<img src="https://picture2.zhihuicn.com/testImage/2/2021/3/5/97DE7627ECA82C404E1EFD3560FA9B7B.png"><br>时,甲、乙、丙的溶解度由大到小的顺序是_____.<br>2.P点的含义_____.3.<img src="https://picture2.zhihuicn.com/testImage/2/2021/3/5/B1CA73346ED11D42656FE6206EC7350E.png"><br>时,在150g水中加入100g甲,所得溶液_____(选填“是”或“不是”)饱和溶液,形成溶液的质量为_____g.4.<img src="https://picture2.zhihuicn.com/testImage/2/2021/3/5/32950889DA083F8FEB4B456B77CE675B.png"><br>时,甲、乙、丙三种物质的饱和溶液升温至<img src="https://picture2.zhihuicn.com/testImage/2/2021/3/5/B1CA73346ED11D42656FE6206EC7350E.png"><br>后,三种溶液的溶质质量分数由大到小的顺序是_____.<br>答案<br><img src="https://picture2.zhihuicn.com/answer/2/5/2021/e4e1b5b5c28947658ed45b1b012d438a/0BE4134EED0C79059AB6B5C3735585F7.png"><br>解析<br><img src="https://picture2.zhihuicn.com/explain/2/5/2021/9bfbb4abfb1f40ffb37fb0e363d201c4/162D6E48896B6498D0D223A14A5836E8.png"><br><br>※题型：问答题※知识点：问答题※试题难度：中等<br>A<br>﹣<br>F<br>为初中化学常见的六种物质,且都含有一种相同元素,它们相互间的关系如图所示。已知<br>A<br>、<br>B<br>、<br>C<br>、<br>D<br>、<br>E<br>是不同类别的物质,<br>C<br>俗称纯碱,<br>F<br>是人体中含量最多的物质,(部分反应物,生成物及反应条件已略去)请回答:<br><img src="https://picture2.zhihuicn.com/testImage/2/2021/3/5/EEF9DACE7CF3663A3E2D204CC0268D25.png"><br>1.写出A、D的化学式:A______,D______<br>2.C与E反应的化学方程式是______。3.图中物质相互间发生的反应。未涉及的基本反应类型是______。<br>答案<br><img src="https://picture2.zhihuicn.com/answer/2/5/2021/e443aaeb853b4195bb561721a87213fc/E703EFD650F84F90F7CCBC073431877A.png"><br>解析<br><img src="https://picture2.zhihuicn.com/explain/2/5/2021/908692699c9444f0ad7ba261afc101f0/42C7A8B93C6F67BFA4071AF9362FDFC7.png"><br><br>※题型：实验题※知识点：实验题※试题难度：中等<br>有一包粉末,可能由<br>KCl<br>、<br>K<br><sub></sub><br>SO<br><sub></sub><br>、<br>K<br><sub></sub><br>CO<br><sub></sub><br>、<br>CuCl<br><sub></sub><br>、<br>MgCl<br><sub></sub><br>中的一种或几种物质组成。现做如下实验:<br>(<br>)根据以下实验操作及现象,请回答:<br><tbody><br>操作<br>现象<br>结论<br>实验<br>①<br>:取少量粉末,加水溶解<br>得到无色透明溶液<br>原粉末中一定没有<br>_____<br>实验<br>②<br>:取<br>①<br>所得溶液少许,加入氢氧化钠溶液<br>看不到明显现象<br>原粉末中一定没有<br>_____<br>实验<br>③<br>:取<br>①<br>所得溶液少许,加入过量硝酸<br>钡<br>溶液<br>出现白色沉淀<br>原粉末中一定有<br>_____<br>或<br>_____<br>中的一种或两种<br>实验<br>④<br>:将实验<br>③<br>所得混合物过滤后,在沉淀中加入稀硝酸<br>_____<br>原粉末中一定有<br><img src="https://picture2.zhihuicn.com/testImage/2/2021/3/5/B90E8387C03EBA3876DAFDC61F8919A9.png"><br>、<br><img src="https://picture2.zhihuicn.com/testImage/2/2021/3/5/5B8D38F2053ED42E3CF96259C61F9F65.png"><br>两种物质<br></tbody><br>(<br>)据上述实验现象,可<br>推知原<br>粉末中可能有<br>_____<br>,为了进一步验证原粉末中可能含有的成分是否存在,请你设计实验证明:<br><tbody><br>操作<br>现象<br>结论<br>_____<br>_____<br>_____<br></tbody><br>(<br>)写出实验<br>③<br>中可能发生的任意一个化学反应的方程式:<br>_____<br><br>答案<br><img src="https://picture2.zhihuicn.com/answer/2/5/2021/b2008a63f1f442eebb61fa3a6cff5f9b/DCB8045856F519508C2854F59C3DDD2C.png"><br>解析<br><img src="https://picture2.zhihuicn.com/explain/2/5/2021/14a093257d2b44f4a531fefbdbafab10/6762BF8653FBE8A8E3B270256F4BC782.png"><br><br>
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