第1篇: 化学实验报告的英语作文

　　Title: Preparation of Fe scrap from waste

　　(NH4) 2SO4.FeSO4.6H2O

　　The purpose of the experiment

　　Learn the method used scrap iron preparation of ferrous ammonium sulfate.

　　Familiar with the water bath, filtered, and evaporated under reduced pressure and crystallization basic working.

　　The experimental principle, the iron and sulfuric acid to generate reactive ferrous sulfate, ferrous sulfate and ammonium sulfate in an aqueous solution of equal molar interaction, becomes less soluble blue generate ferrous ammonium sulfate.

　　Fe+H2SO4=FeSO4+H2 (gas)

　　FeSO4+ (NH4)2SO4+6H2O=(NH4)2SO4.FeSO4.6H2O Usually ferrous rocks are easily oxidized in air, but after the formation of relatively stable perfunctory, not to be oxidized.

　　Experiment to use instruments, scales, constant temperature water bath, pumps, basins, cups, 10ml graduated cylinder, asbestos mesh, glass, tripod, alcohol lamp, funnel.

　　Iron pieces to a solid pharmaceutical use, use of acid ammonium sulfate and 3mol / l of sulfuric acid, concentrated sulfuric acid.

　　The experiment was divided into four steps.

　　The first step Said iron powder 4g into a beaker and then 50ml 10ml, 3mol / L H2SO4 was added to the same beaker. The second step will be the beaker is heated to no more bubbles, and then filtered hot and the filtrate was then filled in 100ml beaker. The third step, called 4g (NH4)2SO4. and the resulting

　　ammonium sulfate and 5.3ml of water to form a saturated solution, and then add it to the ferrous sulfate solution, adjusted with concentrated sulfuric acid to PH = 1. A fourth step, the third step the solution was heated in a water bath to the surface until the film is crystallized, it was slowly cooled and

　　then filtered under reduced pressure to stand finally dried, weighed and the yield was calculated. The results obtained 8.1g bluish powdery

　　crystals. Have this result we can calculate yield, starting with the first step we tried to know the amount of iron, should this we can calculate the theoretical sulfate ferrous sulfate is 0.03mol, then ferrous sulfate obtained by the

　　0.03molFeSO4 theoretical value of ammonium. FeSO4+(NH4)2SO4+6H2O=FeSO4.(NH4)2SO4.6H2O 0.03molX mol

　　X=0.03mol

　　m=XM=0.03molⅹ392g/mol=11.76g

　　Yield = the actual value of the formula is divided by the theoretical value by 100%.it will be calculated into the data obtained in a yield of 68.9%.

第2篇: 化学实验报告的英语作文

　　一、实验目的

　　熟悉应用PHOTOSHOP 在图形处理中的操作，

　　二、实验内容

　　按照样张的样子把两张素材文件合并为一个图像文件。 保存文件为.psd (不得合并图层)

　　三、实验环境

　　实验应用系统及软件：WINDOWNS XP和PHOTOSHOP

　　四、实验步骤

　　1、从桌面上启动PHOTOSHOP

　　2、应用菜单栏中的“文件”菜单“打开”命令分别打开两个图形文件“城市风.JPG”和“云天.jpg”

　　3、应用“图象”—>“旋转画布”—>“水平反转画布”对文件“云天.jpg”进行转换。

　　4、使用方框工具选中中间图片，使用CTRL+j新建图层.

　　5、选择新建图层，并选择“魔术棒工具”大致选出“城市风光.jpg”文件中的建筑轮廓，并配合使用SHIFT、ALT键完成精细的选择。

　　6、使用“选择”菜单中的“反选”命令选中建筑图片拖动到云天图片中。

　　7、使用CTRL+T对图片进行自由变换使其符合云天图片大小。

　　8、保存文件名为xin.psd

　　五、实验结果

　　在实验中着重应用了PHOTOSHOP中的图片反转、图层的建立、图片中的扣图、图片的自由变换，基本达到了实验目标。

　　六、总结

　　实验过程中，开始我不知道如何去除图片中的背景、经过请教摸索终于掌握了其应用方法。个人方面我觉得初次接触PHOTOSHOP很有收获。

第3篇: 化学实验报告的英语作文

　　新《纲要》的一个核心理念是“以幼儿为本”，这是将《规程》中“促进每个幼儿在不同水平上的发展”的思想进一步扩展和深化，充分体现了尊重幼儿的人格、保障幼儿的权利、促进幼儿全面发展的儿童观，这也指导着幼儿英语教育的实施，也是我们开展英语活动时坚持的一个准则，在这半年的时间里英语实验取得了一定的成果，现将半年的英语实验情况总结如下：

　　一、 创设英语物质环境，丰富幼儿活动内容

　　物质环境的创设应体现教育性与艺术性相结合的原则，要把一切空间和时间都当成幼儿受教育的环境，看作是幼儿主动进行口语表达的课堂。物质环境的创设又需要灵活多变，应当与当前的英语学习内容联...