- 1、本文档共16页,可阅读全部内容。
- 2、有哪些信誉好的足球投注网站(book118)网站文档一经付费(服务费),不意味着购买了该文档的版权,仅供个人/单位学习、研究之用,不得用于商业用途,未经授权,严禁复制、发行、汇编、翻译或者网络传播等,侵权必究。
- 3、本站所有内容均由合作方或网友上传,本站不对文档的完整性、权威性及其观点立场正确性做任何保证或承诺!文档内容仅供研究参考,付费前请自行鉴别。如您付费,意味着您自己接受本站规则且自行承担风险,本站不退款、不进行额外附加服务;查看《如何避免下载的几个坑》。如果您已付费下载过本站文档,您可以点击 这里二次下载。
- 4、如文档侵犯商业秘密、侵犯著作权、侵犯人身权等,请点击“版权申诉”(推荐),也可以打举报电话:400-050-0827(电话支持时间:9:00-18:30)。
- 5、该文档为VIP文档,如果想要下载,成为VIP会员后,下载免费。
- 6、成为VIP后,下载本文档将扣除1次下载权益。下载后,不支持退款、换文档。如有疑问请联系我们。
- 7、成为VIP后,您将拥有八大权益,权益包括:VIP文档下载权益、阅读免打扰、文档格式转换、高级专利检索、专属身份标志、高级客服、多端互通、版权登记。
- 8、VIP文档为合作方或网友上传,每下载1次, 网站将根据用户上传文档的质量评分、类型等,对文档贡献者给予高额补贴、流量扶持。如果你也想贡献VIP文档。上传文档
查看更多
化学溶液试题(国外英文资料)
化学溶液试题(国外英文资料)
Ninth unit solution simultaneous practice
First, the multiple-choice question
1. purification of sediment containing a small amount of salt, the following sequence is correct ()
A filtration, evaporation, crystallization, dissolution, B dissolution, evaporation, filtration and crystallization
C dissolved, evaporated, crystallized, filtered, D dissolved, filtered, evaporated, and crystallized
2. the following statement is correct ()
A once the sea water cools, there will be a large number of salt crystals out
B heat the evaporation of potassium nitrate solution, the beginning will be a large number of potassium nitrate crystals
C saturated solution of potassium nitrate can also dissolve potassium nitrate
D cools the solution after the precipitation of potassium nitrate crystals, and still has the crystal of potassium nitrate to precipitate
3. a group of crude salt purification instrument must use is ()
A beaker, glass rod, funnel, evaporation, alcohol lamp B cylinder, beakers, test tube clamp, evaporation, iron
C funnel, glass rod, tweezers, evaporating dish, iron tube, D cylinder, spoon, glass rod, alcohol lamp
At 4.20 DEG C, there are two cups of saturated A solution: a cup of 100g, and a cup of 150 g. In the following conditions, the same crystal quality is found in the two cups of solution (C)
A two cup solutions are cooled to 10 DEG B under same temperature, a cup of water to evaporate 10 g, 60 g water evaporate B cup
A cup of C with 25 g A solution, B cup decreased by 25 g A solution at two D, 30 g water cup has evaporated
5. when the saturated solution of copper sulfate is cooled to room temperature at T C, the phenomenon is observed
A solution becomes colorless, B has white precipitate, C has blue crystal, precipitation D has no change
At 6.25 B, 5 g X substance is dissolved in water at 50 g. At 60 DEG C, the solubility of G and Y is the highest in water at 100 g, and the solubility of X and Y is compared (10)
A, X Y, B, X, Y, C, X = Y, D can
您可能关注的文档
最近下载
- 存储网络配置指导华为oceanstor sns2124 2224 2248 3096 5192 5384产品概述.pdf VIP
- YB∕T 4001.3-2020- 钢格栅板及配套件 第3部分:钢格板楼梯踏板.pdf VIP
- 中国钢结构制造企业资质管理规定(暂行).pdf
- VTE的治疗与预防.pptx VIP
- (公共英语等级考试三级大纲词汇4107个记忆情况.doc VIP
- [医疗机构设置审批有关规定.doc VIP
- 建设工程档案管理课件.ppt VIP
- DD 2019-02 固体矿产地质调查技术要求(1:50000).pdf VIP
- xx太阳能发电公司50MWp光伏电站项目安全设施设计专篇.pdf VIP
- 物业管理单位服务费用测算明细表.pdf VIP
文档评论(0)