0.5m氢氧化钠怎么配制
<img><br><table>查看:24734|回复:17<br><img><br><img><br><img><br><img><br><img><br><img><br><h3>欢迎您注册蒲公英</h3><br>您需要 才可以下载或查看,没有帐号?立即注册<br>x<br>请问在反渗透中要加入0.5%的氢氧化钠溶液调节PH值,加药桶的容量是40升,要加多少克氢氧化钠才能配制出0.5%的氢氧化钠溶液?有算式么?<br><img><br><img><br><img><br><img><br><img><br><img><br><img><br>一般都是质量体积比<br><img><br><img><br><img><br>加200g氢氧化钠就可以,因为100ml加0.5g,40l就加200g<br><img><br><img><br><img><br><img><br>这么简单,不至于吧?<br><h3>点评</h3><br><img><br>这个的用途决定了,随便搞搞出不了事<br><img><br><img><br><img><br><img><br><img><br><img><br><img><br><img><br><img><br>你用的要求不高<br>直接按比例称量配制就好了<br><img><br><img><br><img><br><img><br>
"以下是一篇关于介绍深圳旅游景点的英语作文,可以介绍欢乐谷 锦绣中华,民俗文化村,世界之窗啊等等: Shenzhen is one of China's top tourist destinations, attracting millions of visitors each year. Its pleasant seashore and well-preserved forests have made<br>-----------------------------------------------------------------------------------------------------<br>Shenzhen is one of China's top tourist destinations, attracting millions of visitors each year. Its pleasant seashore and well-preserved forests have made up for its lack of stately mountains and rivers, and earned it the title of ""International Garden City.""<br>Another magnet comes from its theme parks, with a great variety of features ranging from folk culture to a retired aircraft carrier. Distinctive sceneries, fabulous shows and stunning experiences: the parks' charms never seem to fade.<br>And don't forget this is a modern metropolitan, where high-rise buildings and green space intermingle perfectly. It is a financial center, a transportation hub, and home to many first-rate hotels and restaurants. Here you will never fail to find a cuisine that arouses your appetite and curiosity,<br>For tourists, this is a city of convenience, leisure and endless fun.<br>Theme Parks in the Overseas Chinese Town A magnet for tour groups, the Overseas Chinese Town (Hua Qiao Cheng) in Nanshan District features four distinctive theme parks sitting side by side. A monorail commutes around the parks in the area<br>Chinese Folk Culture Villages<br>Right next to Splendid China, the folk culture park dazzles with the histories and mysteries of the country's ethnic groups. Scattering around the 180,000-sqm park are 24 villages built in 1:1 ratio, inhabited by real ethnic people who present their traditional arts, customs, languages and cuisines. Traditional culture performances are held there every day. Like Splendid China, the park is also heavily forested.<br>Happy Valley<br>This is a place for kids and families. Usually packed on weekends by families, the fun park offers more than 100 attractions ranging from the thrilling Space Shot to the lovely cartoon-themed<br>events. It also holds daily performances of various themes.<br>Window of the World<br>Like Splendid China, this 480,000-sqm park features more than 130 miniature replicas of scenic and cultural wonders. The difference is that these are landmarks from all over the world. Here you can find the Golden Gate Bridge and the Niagara Waterfall of the United States, the Kremlin of Russia, Italy's Pisa Tower, Egyptian pyramids, the Taj Mahal of India and an Eiffel Tower built in 1:3 ratio.<br>Although these replicas would probably not attract Western visitors much, the park's daily dance performance and regular carnival-like events are of great fun. Beautifully illuminated at night, it is also an impressive city scene."