山西省晋中市榆次区2019届九年级上学期期末考试化学试卷
※题型：单选题※知识点：单选题※试题难度：容易<br>下列资源的利用过程中发生了化学变化的是( )<br>A.干冰制冷 B.海水晒盐 C.风能发电 D.铁矿炼铁<br>答案<br><img src="https://picture2.zhihuicn.com/answer/2/5/2021/071015cca8b84cf48847cb1b646ef503/01A39E48B8A67989A23F6887F26FCC64.png"><br>解析<br><img src="https://picture2.zhihuicn.com/explain/2/5/2021/3b02d83b02dc4513b7a57f75a4b82650/9B37C7A62BD0AA387ED75E0121FB405F.png"><br><br>※题型：单选题※知识点：单选题※试题难度：容易<br>回收各种废弃塑料可以节约资源,减少“白色污染”。下列表示塑料包装制品回收标志的是( )<br>A.<img src="https://picture2.zhihuicn.com/testImage/2/2021/8/12/4200658A98CF2918DC197B40F9690F27.png"><br>B.<img src="https://picture2.zhihuicn.com/testImage/2/2021/8/12/084F2E17B2E3D2581B1C840380473987.png"><br>C.<img src="https://picture2.zhihuicn.com/testImage/2/2021/8/12/A7F558F05815D66AF9919E10FADD4279.png"><br>D.<img src="https://picture2.zhihuicn.com/testImage/2/2021/8/12/660B2A71131B73AC787F021E0B86C400.png"><br><br>答案<br><img src="https://picture2.zhihuicn.com/answer/2/5/2021/cade0513d99841a0883a4316595dc8f8/01A39E48B8A67989A23F6887F26FCC64.png"><br>解析<br><img src="https://picture2.zhihuicn.com/explain/2/5/2021/d4bb5c6a26994d449729f328be012e90/389C6343E256F9F3A614B2A2370131A9.png"><br><br>※题型：单选题※知识点：单选题※试题难度：较易<br>下列做法不利于保护环境的是( )<br>A.垃圾分类处理 B.使用一次性塑料餐盒<br>C.使用节水龙头 D.乘坐公共交通工具<br>答案<br><img src="https://picture2.zhihuicn.com/answer/2/5/2019/9c5aae081abe446b915193a2994501be/76900E09FAB5EBA344B8EA84E844FF07.png"><br>解析<br>略<br>※题型：单选题※知识点：单选题※试题难度：容易<br>锂电池在手机和电脑中被广泛使用。下列对图中信息解释不一定正确的是 ( )<img src="https://picture2.zhihuicn.com/testImage/2/2021/8/12/B7158602C33AE899C99002D79DA428F2.png"><br>A.原子序数为3 B.锂元素是金属元素<br>C.锂原子的中子数一定是3 D.锂的元素符号是Li<br>答案<br><img src="https://picture2.zhihuicn.com/answer/2/5/2021/127820c3bc8e4c66bcc32f1cd934e1a7/06CA09E70C17EF8BA2D3B8C70D693953.png"><br>解析<br><img src="https://picture2.zhihuicn.com/explain/2/5/2021/bf3de16de1f545c6afe8437068632dde/CF8943C1B69167C41C38FC7740D45D74.png"><br><br>※题型：单选题※知识点：单选题※试题难度：较易<br>二氧化钛<img src="https://picture2.zhihuicn.com/testImage/2/2021/8/12/0D9FB6513120CC6BD3C5BF5ACC61150F.png"><br>可制作用于家装的白色涂料,其中Ti的化合价是( )<br>A.<img src="https://picture2.zhihuicn.com/testImage/2/2021/8/12/89D88352842B64DBB9F15A9A28320617.png"><br>B.<img src="https://picture2.zhihuicn.com/testImage/2/2021/8/12/77EA8460FCD635EA99B83565D8BA6023.png"><br>C.<img src="https://picture2.zhihuicn.com/testImage/2/2021/8/12/4E6CC723FF6075B5E7891B7714C7F9FD.png"><br>D.<img src="https://picture2.zhihuicn.com/testImage/2/2021/8/12/2D1A25F59D1B2F4CD9878C9417E396F9.png"><br><br>答案<br><img src="https://picture2.zhihuicn.com/answer/2/5/2021/dba5c001d2bf490eba1452246a19a9e6/01A39E48B8A67989A23F6887F26FCC64.png"><br>解析<br><img src="https://picture2.zhihuicn.com/explain/2/5/2021/c9861a8826b0485e9d82bdde86e16a5c/BBBC8E681B8E7A5F50ED5BD2CC6F1653.png"><br><br>※题型：单选题※知识点：单选题※试题难度：较易<br>水与我们的生存和发展息息相关,下列关于水的认识正确的是( )<br>A.洁净的天然水一定是纯净物<br>B.水的电解实验说明水中含有氢分子和氧分子<br>C.合理使用化肥、农药,才不会对水质造成大的影响<br>D.用品尝或闻气味的方法可以区别硬水和软水<br>答案<br><img src="https://picture2.zhihuicn.com/answer/2/5/2021/a8e13880a3284d8d85e110489a8162b9/06CA09E70C17EF8BA2D3B8C70D693953.png"><br>解析<br><img src="https://picture2.zhihuicn.com/explain/2/5/2021/0b0da720cfd146259b80f950ca144af4/7364EA2B08E176C194AE74F5E2A1F83A.png"><br><br>※题型：单选题※知识点：单选题※试题难度：较易<br>有关燃烧和灭火的说法错误的是( )<br>A.用水来灭火,是因为降低了可燃物的着火点<br>B.油锅着火时可用锅盖盖灭,是因为隔绝了空气<br>C.木炭在氧气中燃烧比在空气中燃烧更剧烈,是因为氧气浓度不同<br>D.山林中开辟的隔离带可以控制火势蔓延,是因为隔离了可燃物<br>答案<br><img src="https://picture2.zhihuicn.com/answer/2/5/2021/565339d09e5b433898ce7457f2cb6d25/E7F0EDF83F40244C8F0C84B97471AED6.png"><br>解析<br><img src="https://picture2.zhihuicn.com/explain/2/5/2021/9e8c0b9fa8d34f4ebeda99d216a42b93/E4239FDBBAF2E7A8E0F60B3546213D20.png"><br><br>※题型：单选题※知识点：单选题※试题难度：中等<br>下列各组物质在水溶液中能大量共存且无色的是( )<br>A.<img src="https://picture2.zhihuicn.com/testImage/2/2021/8/12/57CAA5BED2B214001C47EBC52A62AA90.png"><br>B.<img src="https://picture2.zhihuicn.com/testImage/2/2021/8/12/FCDE30925B2C469155DD66AF64060FA9.png"><br>C.<img src="https://picture2.zhihuicn.com/testImage/2/2021/8/12/3E93BE78AF414474D00189F7AD0CE675.png"><br>D.<img src="https://picture2.zhihuicn.com/testImage/2/2021/8/12/80639A85E868AE5AD83CC487C8D32630.png"><br><br>答案<br><img src="https://picture2.zhihuicn.com/answer/2/5/2021/067923cd4e0b4c39ad34d4b583c890cf/06CA09E70C17EF8BA2D3B8C70D693953.png"><br>解析<br><img src="https://picture2.zhihuicn.com/explain/2/5/2021/517f049baf0f45bfa933f03539e6ac6f/C1155220162A242F0DDA3805711926F1.png"><br><br>※题型：单选题※知识点：单选题※试题难度：中等<br>NaCl和<img src="https://picture2.zhihuicn.com/testImage/2/2021/8/12/490D2448912FDAA82DEDD28BCF750A33.png"><br>两种物质的溶解度曲线如图所示下列说法正确的是( )<img src="https://picture2.zhihuicn.com/testImage/2/2021/8/12/5BE8BF5F40136957EE5D664C4529192B.png"><br>A.<img src="https://picture2.zhihuicn.com/testImage/2/2021/8/12/69DED204A784CD3FD9A31FA6D4A84B8D.png"><br>时,NaCl的不饱和溶液降温一定会变成饱和溶液<br>B.<img src="https://picture2.zhihuicn.com/testImage/2/2021/8/12/D8D4BFA1BBC7AABD782C4265B0A0D666.png"><br>时,<img src="https://picture2.zhihuicn.com/testImage/2/2021/8/12/490D2448912FDAA82DEDD28BCF750A33.png"><br>溶液降温后一定有晶体析出<br>C.<img src="https://picture2.zhihuicn.com/testImage/2/2021/8/12/69DED204A784CD3FD9A31FA6D4A84B8D.png"><br>时,NaCl和<img src="https://picture2.zhihuicn.com/testImage/2/2021/8/12/490D2448912FDAA82DEDD28BCF750A33.png"><br>的溶液各100 g,其溶质的质量一定相等<br>D.<img src="https://picture2.zhihuicn.com/testImage/2/2021/8/12/D8D4BFA1BBC7AABD782C4265B0A0D666.png"><br>时,<img src="https://picture2.zhihuicn.com/testImage/2/2021/8/12/490D2448912FDAA82DEDD28BCF750A33.png"><br>饱和溶液中溶质质量分数一定大于NaCl溶液中溶质质量分数<br>答案<br><img src="https://picture2.zhihuicn.com/answer/2/5/2021/65c9a8e8996d421a8e84db08e234bc1a/01A39E48B8A67989A23F6887F26FCC64.png"><br>解析<br><img src="https://picture2.zhihuicn.com/explain/2/5/2021/2d2f074acf4948079dc7b170994cde61/31FE4E84307E822F7506CF356C2FD097.png"><br><br>※题型：单选题※知识点：单选题※试题难度：中等<br>下列除杂所选用试剂与操作方法均正确的是( )<br><tbody><br>选项<br>物质(括号内为杂质)<br>除杂试剂<br>实验操作<br>A<br><img src="https://picture2.zhihuicn.com/testImage/2/2019/10/28/1E75AF74B59C3BB0456B1241E2240EB3.png"><br>水<br>溶解、过滤<br>B<br><img src="https://picture2.zhihuicn.com/testImage/2/2019/10/28/1415FABFCFC423A11B5B4E36DE4B24FE.png"><br>灼热CuO<br>洗气<br>C<br><img src="https://picture2.zhihuicn.com/testImage/2/2019/10/28/DB5015BA10CF4665F738FF8110F28BFA.png"><br>过量<img src="https://picture2.zhihuicn.com/testImage/2/2019/10/28/12F5C4AC564AD3765E56094E20CC81FF.png"><br>溶液<br>过滤<br>D<br><img src="https://picture2.zhihuicn.com/testImage/2/2019/10/28/7E9D002E9582A0EC92B8D59D9C5E0910.png"><br>足量稀盐酸<br>蒸发结晶<br></tbody><br>A.A B.B C.C D.D<br>答案<br><img src="https://picture2.zhihuicn.com/answer/2/5/2019/d415e77226e94bb593056ae08172e9f8/01A39E48B8A67989A23F6887F26FCC64.png"><br>解析<br><img src="https://picture2.zhihuicn.com/explain/2/5/2019/3ac1b36f60e94a81be6beb981e8c9489/564171F24995757B0185BCE3184ABE6D.png"><br><br>※题型：填空题※知识点：填空题※试题难度：较易<br>化学与生活息息相关,下面是生活中的化学知识<br>1.早餐食物中有馒头、牛奶、鸡蛋和黄瓜,其中富含维生素的是_____;<br>2.运动饮料中常含有钠、钾、钙等,这里的钠、钾、钙指_____(填“分子”、“原子”或“元素”);3.利用厨房中的_____,可以溶解水壶中的水垢;4.走进食堂,就能闻到饭菜的香味,说明分子_____;5.打开水瓶有气_____出,说明原瓶中的压强比瓶外大气压强_____。<br>答案<br><img src="https://picture2.zhihuicn.com/answer/2/5/2021/ee9eea4b10194b8787b900babea0fb0b/E68F5A1320D3425BA55FC755B39E785B.png"><br>解析<br><img src="https://picture2.zhihuicn.com/explain/2/5/2021/fb1bedd23496475182c5313aea53530b/644F09706277CAF097E65C143AC394A3.png"><br><br>※题型：填空题※知识点：填空题※试题难度：中等<br>据图,回答下列小题<br><img src="https://picture2.zhihuicn.com/testImage/2/2021/8/12/17A1D5B949671EFF2467EF500C9FC8F4.png"><br>1.图中所用材料中,属于有机合成材料的是_____;2.自行车上喷涂的油漆,除了美观外,主要作用是防锈,其原理是_____;3.铝合金和不锈钢属于_____(填“纯金属”或“合金”);4.自行车与汽车相比具有的优点是_____(写一点即可)。<br>答案<br><img src="https://picture2.zhihuicn.com/answer/2/5/2021/b31a2ea942054f9d822a1e2a519ef0f1/500DA83B57EF81A37C90E53FEFFA4D71.png"><br>解析<br><img src="https://picture2.zhihuicn.com/explain/2/5/2021/3da98a6132f04cc48faa84762bc5818b/A58BE425E777F504D55E365277653F16.png"><br><br>※题型：填空题※知识点：填空题※试题难度：较易<br>在牙膏生产中常添加一种极细小的<br><img src="https://picture2.zhihuicn.com/testImage/2/2021/8/12/0125C0E265985712A3A9CAA2643B9043.png"><br>粉末作为摩擦剂,它以石灰石<br><img src="https://picture2.zhihuicn.com/testImage/2/2021/8/12/75C7173ABC6350BA9AC7E74E55991157.png"><br>所含杂质不溶于水也不参加反应<br><img src="https://picture2.zhihuicn.com/testImage/2/2021/8/12/111662C96060001758BF64C1D2BB906E.png"><br>为原料生产块状<br><img src="https://picture2.zhihuicn.com/testImage/2/2021/8/12/0125C0E265985712A3A9CAA2643B9043.png"><br>,再将块状<br><img src="https://picture2.zhihuicn.com/testImage/2/2021/8/12/0125C0E265985712A3A9CAA2643B9043.png"><br>进一步加工成细小粉末。如图是实验室模拟生产<br>“<br>摩擦剂<br>”<br>的流程。<br><img src="https://picture2.zhihuicn.com/testImage/2/2021/8/12/1D97A1DED5B7583DDF9D0711B86C1427.png"><br>1.操作a用到的玻璃仪器有______;<br>2.气体B的相对分子质量为______;溶液C的溶质是______<img src="https://picture2.zhihuicn.com/testImage/2/2021/8/12/75C7173ABC6350BA9AC7E74E55991157.png"><br>填化学式<img src="https://picture2.zhihuicn.com/testImage/2/2021/8/12/111662C96060001758BF64C1D2BB906E.png"><br>;3.在反应<img src="https://picture2.zhihuicn.com/testImage/2/2021/8/12/5D3B2D84BD0D33ABC932F84748A99D2F.png"><br>一<img src="https://picture2.zhihuicn.com/testImage/2/2021/8/12/DA3FF47BB0A0F1234846194E6C269D85.png"><br>中任选一个写出其化学方程式______<img src="https://picture2.zhihuicn.com/testImage/2/2021/8/12/75C7173ABC6350BA9AC7E74E55991157.png"><br>先选反应序号再写方程式<img src="https://picture2.zhihuicn.com/testImage/2/2021/8/12/111662C96060001758BF64C1D2BB906E.png"><br>。<br>答案<br><img src="https://picture2.zhihuicn.com/answer/2/5/2021/9bdd22ad2f3b4ca4977d6782090b7528/B083E8846111CB145E8C280CBF4CADE5.png"><br>解析<br><img src="https://picture2.zhihuicn.com/explain/2/5/2021/a34f6de4f4484348821a62aecd1f37b6/BE562BF527500BB1A010ADAC41D14FC9.png"><br><br>※题型：填空题※知识点：填空题※试题难度：较易<br>根据图中所给信息,回答问题:<br><img src="https://picture2.zhihuicn.com/testImage/2/2021/8/12/EBF544087036DC4555DDF4B288F82E06.png"><br>1.上述四种物质中属于氧化物的是______<img src="https://picture2.zhihuicn.com/testImage/2/2021/8/12/75C7173ABC6350BA9AC7E74E55991157.png"><br>填化学式<img src="https://picture2.zhihuicn.com/testImage/2/2021/8/12/111662C96060001758BF64C1D2BB906E.png"><br>,属于单质的是______<img src="https://picture2.zhihuicn.com/testImage/2/2021/8/12/75C7173ABC6350BA9AC7E74E55991157.png"><br>填名称<img src="https://picture2.zhihuicn.com/testImage/2/2021/8/12/111662C96060001758BF64C1D2BB906E.png"><br>;<br>2.该反应属于基本反应类型中的______。<br>答案<br><img src="https://picture2.zhihuicn.com/answer/2/5/2021/f13b0f03de83402da9ceacacce7730f1/5D3A27ED6CCE4234D57B76DF7C277A3E.png"><br>解析<br><img src="https://picture2.zhihuicn.com/explain/2/5/2021/652b7b6764b249bfb82276406b27cce3/EFD171CFA2F0AF09439E8A4AAEC11B3E.png"><br><br>※题型：计算题※知识点：计算题※试题难度：中等<br>向某锌粉样品<br>(<br>所含杂质既不溶于水也不溶于酸<br>)<br>中加入足量的稀盐酸<br>123.4g<br>。使其充分反应,所加锌粉的质量与产生气体的质量的关系如图所示:<br><img src="https://picture2.zhihuicn.com/testImage/2/2021/8/12/5CB1F7F55B9B1F1C2A42EB5962F2688D.png"><br>试计算:反应后所得溶液中溶质的质量分数<br>____<br><br>答案<br><img src="https://picture2.zhihuicn.com/answer/2/5/2021/4c659fe1da5d4524b8bb49f532f40004/21F3A1F26F20460759564DCDA61E1BC3.png"><br>解析<br><img src="https://picture2.zhihuicn.com/explain/2/5/2021/813a597d937945ccab8f7c54117a71a2/03A2EF8B523AFB779E5CE1E1DAA1D2D2.png"><br><br>※题型：填空题※知识点：填空题※试题难度：中等<br><img src="https://picture2.zhihuicn.com/testImage/2/2021/8/12/05ED578C2D56D4E6116DF737F4FCF51F.png"><br>是初中化学常见的五种不同类别的物质,这五种物质分别由:<br>H<br>、<br>O<br>、<br>N<br>、<br>Ag<br>、<br>Cl<br>、<br>Na<br>六种元素中的<br><img src="https://picture2.zhihuicn.com/testImage/2/2021/8/12/61CC9D0886E3AC710081C9741B1CD6B8.png"><br>种元素组成。请回答下列问题:<br>1.A物质中两种元素的原子个数比为1:1,两种元素的质量比为1:16,在催化剂的作用下,可以生成助燃性气体B,写出有关的化学反应方程式______;<br>2.打开盛放C物质的瓶盖,闻到有刺激性气味,该溶液的pH为2,C与D的溶液反应,生成白色沉淀,该反应的化学方程式为______,该反应的微观实质为______;3.E物质容易吸收空气中的水分,而被潮解,同时还与空气中的二氧化碳反应,所以必须密封保存。E的俗名为______(写一种即可)。<br>答案<br><img src="https://picture2.zhihuicn.com/answer/2/5/2021/cdb71723ab894f02b498ffe4a2511216/2E0019634729E9407E09AC284B386028.png"><br>解析<br><img src="https://picture2.zhihuicn.com/explain/2/5/2021/7f2589cacafd46ceb4cf7c31fe51bf6d/6B23D6D9D135A1FFE8845E2D4E644DA0.png"><br><br>※题型：填空题※知识点：填空题※试题难度：中等<br>消毒液是一种以次氯酸钠为主的高放消毒剂,呈无色或淡黄色液体,且具有刺激性气味。被广泛用于宾馆、医院、家庭等许多场所的消毒。<br>次氯酸钠与空气中的水和二氧化碳反应生成次氯酸<br><img src="https://picture2.zhihuicn.com/testImage/2/2021/8/12/C31AAAFB87CE6C1D8FAD98C68E4FA10E.png"><br>,次氯酸具有极强的氧化性,能够将很多物质氧化,使其变性,因而起到消毒的作用。<br>“84<br>消毒液<br>”<br>在使用过程中的注意事项:<br>应避免接触皮肤,因消毒液有一定的刺激性与腐蚀性,必须稀释以后才能使用,<br>释时应戴<br>手套。<br>漂白作用较强,对织物有漂白作用,但对彩色衣物要慎用。<br>要避光保存,宣现用现配,一次性使用,勿用热水稀释配制。<br>不能和<br>洁厨灵一起<br>使用。<br>(知识链换):<br>①<br>洁厕灵的主要成分是<br>HCl<br>,与<br>“84<br>消毒液<br>”<br>反应会生成氯气<br><img src="https://picture2.zhihuicn.com/testImage/2/2021/8/12/3F7A39BC9E516EE43EEC0DFD4056000B.png"><br>,同时生成氯化钠和水<br>②<br>氯气是黄绿色的刺激性气体,人体吸入会引起呼吸道的损伤,对眼睛、黏膜和皮肤有刺激性。<br>依据上文回答问题:<br>1.消毒液能消毒的原因是______;<br>2.消毒液的热稳定性______(填“好”或“差”);3.消毒液与洁厕灵不能一起使用的原因是______,有关的化学反应方程式为______。<br>答案<br><img src="https://picture2.zhihuicn.com/answer/2/5/2021/154a075b811e45b8a6d7c66545720316/70D8B691D8C3F52621C3FD18D47ADA6C.png"><br>解析<br><img src="https://picture2.zhihuicn.com/explain/2/5/2021/5018dbacccae44f7ac713edc67afb93a/438CA445CC061726BDD1BAF6700226E1.png"><br><br>※题型：实验题※知识点：实验题※试题难度：中等<br>如图所示为实验室常见的气体制备、干燥、收集装置。请根据要求,回答下列问题:<br><img src="https://picture2.zhihuicn.com/testImage/2/2021/8/12/F85D4F961BA9DD6020F0B1B4BCB254DB.png"><br>1.仪器<img src="https://picture2.zhihuicn.com/testImage/2/2021/8/12/9FFFF2ADD91741400B3B350EC638BB5C.png"><br>的名称是______,洗涤仪器<img src="https://picture2.zhihuicn.com/testImage/2/2021/8/12/5D3B2D84BD0D33ABC932F84748A99D2F.png"><br>时,用到的仪器是______;<br>2.装置B可用于实验室制取______,G装置可以收集的气体为______,要得到干燥的二氧化碳气体,可以通过下图的______装置(均填字母即可);3.装置B和装置C都可用于实验室制取氧气,装置C的优点是:可以控制反应的速率,你觉得此说法对吗?______(填“对”或“不对”);4.实验室可以用加热氯化铵和熟石灰固体混合物的方法制取氨气。已知氨气是一种无色有刺激性气味的气体,密度比空气小,极易溶于水。为了制取并收集一瓶干燥的氨气,且减少对空气的污染,在上述装置中选出最佳的实验装置组合是______。<br>答案<br><img src="https://picture2.zhihuicn.com/answer/2/5/2021/f1f813722ac5427ab982bff4068ff58a/CF9C5093CA9D2B5DE8531B9C23C8BB65.png"><br>解析<br><img src="https://picture2.zhihuicn.com/explain/2/5/2021/bb1b23ddc3d042d6810544ffa5c820de/D8BD2EA566BE658010B9B62AE5F76F52.png"><br><br>※题型：实验题※知识点：实验题※试题难度：中等<br>化学兴趣小组的同学探究金属和盐溶液反应时,发现将钠放入<br><img src="https://picture2.zhihuicn.com/testImage/2/2021/8/12/9088F9111F1A003D21C1331598B3FA03.png"><br>溶液中有气泡和白色沉淀产生。为了进一步探究,小组同学将充分反应后的混合物过滤,得固体<br>A<br>和滤液<br>B<br><img src="https://picture2.zhihuicn.com/testImage/2/2021/8/12/6DAC49B70C58FCE02637FD75FE31835A.png"><br>查阅资料)钠与水反应生成氢氧化钠和氢气<br>(分析、思考、实验)钠放入<br><img src="https://picture2.zhihuicn.com/testImage/2/2021/8/12/9088F9111F1A003D21C1331598B3FA03.png"><br>溶液中产生的气泡,应该是<br>______<br>;取固体<br>A<br>加入过量稀盐酸,<br>A<br>全部溶解,且无气泡产生,此反应的化学方程式为<br>______<br>;<br>提出问题)滤液<br>B<br>中的溶质成分是什么?<br>(提出猜想)猜想<br><img src="https://picture2.zhihuicn.com/testImage/2/2021/8/12/5D3B2D84BD0D33ABC932F84748A99D2F.png"><br>:有<br><img src="https://picture2.zhihuicn.com/testImage/2/2021/8/12/AF46297A9702CDB7F07F372B6B2255C7.png"><br>和<br>NaOH<br>猜想<br><img src="https://picture2.zhihuicn.com/testImage/2/2021/8/12/9FFFF2ADD91741400B3B350EC638BB5C.png"><br>:有<br><img src="https://picture2.zhihuicn.com/testImage/2/2021/8/12/AF46297A9702CDB7F07F372B6B2255C7.png"><br>和<br><img src="https://picture2.zhihuicn.com/testImage/2/2021/8/12/9088F9111F1A003D21C1331598B3FA03.png"><br>猜想<br><img src="https://picture2.zhihuicn.com/testImage/2/2021/8/12/DA3FF47BB0A0F1234846194E6C269D85.png"><br>:<br>______<br>;<br>(实验设计)<br><tbody><br>实验操作<br>实验现象或发生反应的方程式<br>实验结论<br>方案<br>一<br>:取滤液<br>B<br>少许于试管中,滴入硫酸铜溶液<br>无明显现象<br>猜想<br><img src="https://picture2.zhihuicn.com/testImage/2/2021/8/12/5D3B2D84BD0D33ABC932F84748A99D2F.png"><br>______<br>方案二:取滤液<br>B<br>少许于试管中,滴入氢氧化钠溶液<br>方程式为:<br>______<br>猜想<br><img src="https://picture2.zhihuicn.com/testImage/2/2021/8/12/9FFFF2ADD91741400B3B350EC638BB5C.png"><br>成立<br>方案三:取滤液<br>B<br>少许于试管中,滴入氢氧化钡溶液<br>现象为:<br>______<br></tbody><br>(讨论交流)通过讨论大家一致认为方案三不可取,原因是<br>______<br><br>答案<br><img src="https://picture2.zhihuicn.com/answer/2/5/2021/c20444e7bd564e4095b327ec36be9cc1/3236A7E8942BB310C439AAECFCBDD980.png"><br>解析<br><img src="https://picture2.zhihuicn.com/explain/2/5/2021/04e34ca2a6cd4532958c8dd0041ff0db/D2F8A04AEA07F5724CF96757673E2BD6.png"><br><br>
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