英文配音英文版用过氧化氢制备氧气实验配音文案
配音云配音为您推荐一篇英文配音文案
The experimental set up has a conical flask containing manganese dioxide, which acts as a catalyst. The thistle funnel is fitted to this flask. The thistle funnel is filled with hydrogen peroxide. The delivery tube leads to an inverted gas jar, placed over a trough of water. 
Now, allow hydrogen peroxide to be added dropwise into manganese dioxide. Two molecules of hydrogen peroxide, in the presence of a catalyst, manganese dioxide, break up into two molecules of water and release a molecule of oxygen. The released oxygen gas passes through the delivery tube, then over water and starts getting collected in the gas jar. This method of collection of gas is called the downward displacement of water.
Two molecules of hydrogen peroxide in the presence of a catalyst, manganese dioxide give two molecules of water and release a molecule of oxygen.
Conical flask Manganese dioxide Thistle funnel Hydrogen peroxide Gas jar Trough Water Gas O2 Gas Downward displacement of water
Briefly describes the preparation and properties of oxygen gas. Discusses the natural occurrence and preparation of oxygen. Displays a schematic representation of the shell structure of oxygen. Describes the method of preparation of oxygen from hydrogen peroxide. Discusses in short various methods of preparation of oxygen and lists its properties and uses. E05900022_041 Two molecules of hydrogen peroxide in the presence of manganese dioxide give  water oxygen both oxygen and water   oxygen and hydrogen Hydrogen peroxide decomposes to give oxygen and water in the presence of manganese dioxide (catalyst). The oxygen gas formed by the decomposition of hydrogen peroxide is collected by ___________. the upward displacement of water the downward displacement of water   the decantation of water the filtration of water Oxygen is slightly soluble in water. Hence, it is collected by the downward displacement of water. _________ acts as a catalyst during preparation of oxygen from hydrogen peroxide. Carbon dioxide Manganese dioxide Iron Chromium Manganese dioxide provides the site for hydrogen peroxide molecules to react. Production of oxygen from hydrogen peroxide is a type of _________ reaction. combination neutralization decomposition None of the above As hydrogen peroxide breaks into oxygen and water in the presence of manganese dioxide catalyst, it is a type of decomposition reaction. State whether the following statement is true or false.  Oxygen is completely soluble in water. True False Oxygen is slightly soluble in water. The molecular formula for hydrogen peroxide is _________._________。 H2 OHH2 OH H2 OH2 O O2 HO2 H None of the above The molecular formula of hydrogen peroxide is H2 O2 . Complete the following reaction.  2H2 O2  → ______________________ H2 O + O2 H2 O + O2  2H2 O + O2 2H2 O + O2  2H2 O + 2O2 2H2 O + 2O2  H2 O + 2O2 H2 O + 2O2  2H2 O2  → 2H2 O + O2 2H2 O2  → 2H2 O + O2  E05900022_051 Lab Preparation of Oxygen Introduction: In this simulation, you will learn how oxygen can be prepared in the laboratory from H2O2, using MnO2 as catalyst.
配音    

免责声明： 以上整理自互联网，与本站无关。其原创性以及文中陈述文字和内容未经本站证实，对本文以及其中全部或者部分内容、文字的真实性、完整性、及时性本站不作任何保证或承诺，请读者仅作参考，并请自行核实相关内容。（我们重在分享，尊重原创，如有侵权请联系在线客服在24小时内删除）

联系客服 立即下单