{"show":[{"id":1792,"catid":"12510,77563,89338,28823,9873,12414,46150,31018,31021,102681,91622","title":"常用盐的用途","subtitle":"常用盐的用途","status":4,"type":"normal","price":30,"serializemode":0,"lessonnum":0,"smallpicture":"/dist/images/defaultcover/chymistry/6.png","goals":null,"intro":"氯化钠俗称食盐,经常用来做调味品、防腐剂、融雪剂(降低雪的熔点);碳酸钠俗称纯碱、苏打,广泛应用于生产玻璃、造纸、纺织、洗涤剂等;","ratingnum":0,"rating":0,"hits":58,"teachername":"张璐璐","publisheruid":0,"uid":82,"xd":2,"deletedtime":null,"xk":7,"nj":null,"ver":"12461","locked":0,"grade":0,"stage":3,"comment":"","remark":"","recommend":0,"admin":518,"createdtime":1478654238,"updatedtime":1495845612},{"id":2320,"catid":"9873,31019,77563,89338,28823,12414,46150","title":"盐的化学性质","subtitle":"盐的化学性质","status":4,"type":"normal","price":30,"serializemode":0,"lessonnum":0,"smallpicture":"/dist/images/defaultcover/chymistry/4.png","goals":null,"intro":"盐+金属=新盐+新金属;盐+酸=新盐+新酸;盐+碱=新盐+新碱;盐+盐=新盐+新盐。","ratingnum":0,"rating":0,"hits":17,"teachername":"张璐璐","publisheruid":0,"uid":81,"xd":2,"deletedtime":null,"xk":7,"nj":null,"ver":"","locked":0,"grade":0,"stage":3,"comment":"","remark":"","recommend":null,"admin":518,"createdtime":1490147679,"updatedtime":1495790894},{"id":2321,"catid":"89368,24814,12511,31020,77563,28824,12426,46165","title":"常见化肥的种类和作用","subtitle":"常见化肥的种类和作用","status":4,"type":"normal","price":30,"serializemode":0,"lessonnum":0,"smallpicture":"/dist/images/defaultcover/chymistry/5.png","goals":null,"intro":"氮肥主要由尿素、氨水、铵盐、硝酸盐构成,是植物体内蛋白质、核酸和叶绿素的组成元素,能促进作物的茎叶生长茂盛,叶色浓绿。","ratingnum":0,"rating":0,"hits":17,"teachername":"张璐璐","publisheruid":0,"uid":81,"xd":2,"deletedtime":null,"xk":7,"nj":null,"ver":"","locked":0,"grade":0,"stage":3,"comment":"","remark":"","recommend":null,"admin":518,"createdtime":1490148392,"updatedtime":1495691680},{"id":1795,"catid":"24814,12426,12511,31020,77563,28824,46165","title":"化肥的简易鉴别","subtitle":"化肥的简易鉴别","status":4,"type":"normal","price":30,"serializemode":0,"lessonnum":0,"smallpicture":"/dist/images/defaultcover/chymistry/1.png","goals":null,"intro":"本节主要介绍氮肥、钾肥、磷肥的几种简易鉴别的方法。化肥中的铵态氮肥能与碱作用生成氨气,可以用来检验铵态氮肥,同时注意这类肥料不能与碱性物质混合。","ratingnum":0,"rating":0,"hits":65,"teachername":"张璐璐","publisheruid":0,"uid":82,"xd":2,"deletedtime":null,"xk":7,"nj":null,"ver":"","locked":0,"grade":0,"stage":3,"comment":"","remark":"","recommend":0,"admin":518,"createdtime":1478654778,"updatedtime":1495691605},{"id":744,"catid":"12511,24814,12426,28824,46165,31020","title":"施用化肥对环境的影响","subtitle":"施用化肥对环境的影响","status":4,"type":"normal","price":30,"serializemode":0,"lessonnum":0,"smallpicture":"/dist/images/defaultcover/chymistry/4.png","goals":null,"intro":"施用化肥对环境的影响有造成江河湖及地下水源的污染、威胁近海生物、影响人类健康和破坏土壤结构。\r\n","ratingnum":0,"rating":0,"hits":54,"teachername":"张璐璐","publisheruid":0,"uid":82,"xd":2,"deletedtime":null,"xk":7,"nj":null,"ver":"","locked":0,"grade":0,"stage":3,"comment":"","remark":"","recommend":0,"admin":518,"createdtime":1477027303,"updatedtime":1495691245},{"id":745,"catid":"12413,9823,30978,46149","title":"海水晒盐的原理和过程","subtitle":"海水晒盐的原理和过程","status":4,"type":"normal","price":30,"serializemode":0,"lessonnum":0,"smallpicture":"/dist/images/defaultcover/chymistry/4.png","goals":null,"intro":"海水晒盐原理是通过风吹日晒蒸发溶剂得到食盐晶体。先将海水(或海边地下卤水)引入盐田的蒸发池,通过日晒蒸发水分到一定程度时,再导入结晶池,继续日晒,海水就会成为食盐的饱和溶液,接着会逐渐析出食盐晶体。","ratingnum":0,"rating":0,"hits":62,"teachername":"张璐璐","publisheruid":0,"uid":82,"xd":2,"deletedtime":null,"xk":7,"nj":null,"ver":"","locked":0,"grade":0,"stage":3,"comment":"","remark":"","recommend":0,"admin":518,"createdtime":1477027318,"updatedtime":1495691072},{"id":2323,"catid":"12414,31019,46150","title":"酸碱盐的溶解性","subtitle":"酸碱盐的溶解性","status":4,"type":"normal","price":30,"serializemode":0,"lessonnum":0,"smallpicture":"/dist/images/defaultcover/chymistry/6.png","goals":null,"intro":"酸、碱、盐溶解性表是学习化学的重要工具。","ratingnum":0,"rating":0,"hits":16,"teachername":"张璐璐","publisheruid":0,"uid":81,"xd":2,"deletedtime":null,"xk":7,"nj":null,"ver":"","locked":0,"grade":0,"stage":3,"comment":"","remark":"","recommend":null,"admin":518,"createdtime":1490148790,"updatedtime":1495690674},{"id":2324,"catid":"12508,9826,30984,12414,46150","title":"离子或物质的共存问题","subtitle":"离子或物质的共存问题","status":4,"type":"normal","price":30,"serializemode":0,"lessonnum":0,"smallpicture":"/dist/images/defaultcover/chymistry/4.png","goals":null,"intro":"离子(物质)共存问题实际上就是考虑溶液中离子(物质)之间能否反应,能发生化学反应,则不能共存。","ratingnum":0,"rating":0,"hits":17,"teachername":"张璐璐","publisheruid":0,"uid":81,"xd":2,"deletedtime":null,"xk":7,"nj":null,"ver":"","locked":0,"grade":0,"stage":3,"comment":"","remark":"","recommend":null,"admin":518,"createdtime":1490148887,"updatedtime":1495690568},{"id":1796,"catid":"12509,9870,102683,91624,9825,30982,89336,9871,76885,46144,77631","title":"酸碱指示剂的使用","subtitle":"酸碱指示剂的使用","status":4,"type":"normal","price":30,"serializemode":0,"lessonnum":0,"smallpicture":"/dist/images/defaultcover/chymistry/5.png","goals":null,"intro":"本节主要讲紫色石蕊试液和酚酞这两种酸碱指示剂在鉴别酸或碱溶液时的使用方法。","ratingnum":0,"rating":0,"hits":58,"teachername":"张璐璐","publisheruid":0,"uid":82,"xd":2,"deletedtime":null,"xk":7,"nj":null,"ver":"12461","locked":0,"grade":0,"stage":3,"comment":"","remark":"","recommend":0,"admin":518,"createdtime":1478654990,"updatedtime":1495690248},{"id":1411,"catid":"12509,102683,91624,9870,9825,30982,89336,9871,76885,46144,77631","title":"溶液的酸碱度测定","subtitle":"溶液的酸碱度测定","status":4,"type":"normal","price":30,"serializemode":0,"lessonnum":0,"smallpicture":"/dist/images/defaultcover/chymistry/3.png","goals":null,"intro":"溶液的酸碱度是指溶液的酸碱性强弱程度,一般用pH值来表示,使用pH试纸来测定溶液的酸碱度。","ratingnum":0,"rating":0,"hits":46,"teachername":"邹老师","publisheruid":0,"uid":82,"xd":2,"deletedtime":null,"xk":7,"nj":null,"ver":"12461","locked":0,"grade":0,"stage":3,"comment":"","remark":"","recommend":0,"admin":518,"createdtime":1477530845,"updatedtime":1495690175}],"xdxk":{"2648":{"name":"小学数学","xd":1,"xk":3},"467":{"name":"初中数学","xd":2,"xk":3},"215":{"name":"初中英语","xd":2,"xk":4},"394":{"name":"初中科学","xd":2,"xk":5},"226":{"name":"初中物理","xd":2,"xk":6},"534":{"name":"初中化学","xd":2,"xk":7},"660":{"name":"初中历史与社会","xd":2,"xk":20}},"count":"48","catname":{"1792":"初中化学","2320":"初中化学","2321":"初中化学","1795":"初中化学","744":"初中化学","745":"初中化学","2323":"初中化学","2324":"初中化学","1796":"初中化学","1411":"初中化学"},"ispay":{"1792":0,"2320":0,"2321":0,"1795":0,"744":0,"745":0,"2323":0,"2324":0,"1796":0,"1411":0},"fmtime":{"1792":"2017-05-27 08:40","2320":"2017-05-26 17:28","2321":"2017-05-25 13:54","1795":"2017-05-25 13:53","744":"2017-05-25 13:47","745":"2017-05-25 13:44","2323":"2017-05-25 13:37","2324":"2017-05-25 13:36","1796":"2017-05-25 13:30","1411":"2017-05-25 13:29"},"videonum":{"1792":1,"2320":1,"2321":1,"1795":1,"744":1,"745":1,"2323":1,"2324":1,"1796":1,"1411":1},"pages":"
","page_items":"\n3/5"}