中考科学总复习第三篇物质科学第10讲物质的除杂检验鉴别与推断市赛课公开课一等奖省名师优质课获奖.pptx

单击此处编辑母版标题样式,单击此处编辑母版文本样式,第二级,第三级,第四级,第五级,第10讲物质除杂、检验、,判别与推断,1/88,2/88,考点,考试内容,考试要求,浙江三年中考示例,物质间相互转化,除杂、检验、判别与推断,b,宁波，T21，6分,绍兴，T35，4分,湖州，T23，6分,宁波，T7，4分,3/88,4/88,选项,试验操作,现象,结论,A,向盛有少许无色溶液试管中滴加酚酞试液,溶液变红,该溶液一定呈碱性,B,向盛有少许无色溶液试管中滴加氯化钡溶液,出现白色沉淀,该溶液中一定含有硫酸根离子,C,向盛有少许固体试管中滴加稀盐酸,产生气泡,该固体一定含有碳酸盐,D,点燃某气体，在火焰上方罩一个干冷烧杯,烧杯内壁,出现水珠,该气体一定是氢气,5/88,6/88,7/88,8/88,9/88,10/88,11/88,12/88,13/88,14/88,15/88,16/88,17/88,18/88,19/88,20/88,21/88,22/88,23/88,24/88,25/88,26/88,27/88,28/88,29/88,30/88,31/88,32/88,33/88,34/88,35/88,36/88,37/88,38/88,39/88,40/88,41/88,42/88,43/88,44/88,45/88,选项,物质,杂质,试剂和方法,A,NaNO3,Na2CO3,滴入足量稀盐酸至不再产生气泡,B,KCl,K2SO4,滴入适量Ba(NO3)2溶液、过滤,C,CO,CO2,经过灼热氧化铜粉末,D,H2,HCl,先经过NaOH溶液，再经过浓硫酸,46/88,47/88,48/88,49/88,50/88,51/88,52/88,53/88,54/88,55/88,56/88,57/88,58/88,59/88,60/88,61/88,62/88,63/88,64/88,65/88,66/88,67/88,68/88,69/88,70/88,71/88,72/88,73/88,74/88,75/88,76/88,77/88,78/88,79/88,80/88,81/88,82/88,83/88,84/88,85/88,86/88,87/88,谢谢观看,88/88,