of hydrogen peroxide Potatoes Raw potato Potato soaked in baking soda Potato soaked in baking soda Stopwatch Goggles Procedures: 1. Get all your materials. Put all the potatoes into individual test tubes. 2. Pour 3mL of hydrogen peroxide into one test tube. Watch and time how much time goes by before the reaction begins. 3. Observe and write down the time. 4. Repeat steps 2 and 3 until all the potatoes have been tested and observed. Data: Type of potato Amount of hydrogen peroxide
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measuring the total hydrogen yield of the reaction. Stoichiometry was then used to find a molar ratio between hydrogen and zinc. After calculating the moles of zinc‚ the mass can then be figured by multiplying by the molar mass of zinc. Experimental Procedure. First an apparatus needed to be set up to measure the hydrogen gas given off in the reaction of the zinc on the nail and the hydrochloric acid. A Erlenmeyer flask was used to hold the acid and nail which released the hydrogen into a rubber
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Water is a chemical compound with the chemical formula H2O. A water molecule contains one oxygen and two hydrogen atoms connected by covalent bonds. Water is a liquid at standard ambient temperature and pressure‚ but it often co-exists on Earth with its solid state‚ ice‚ and gaseous state (water vapor or steam). Water also exists in a liquid crystal state near hydrophilic surfaces. Water is considered a purifier in most religions. Major faiths that incorporate ritual washing (ablution) include Christianity
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from 5 to 20 nm. A fluidised bed reactor was developed for a large-scale synthesis of the carbon nanotubermetal oxide composite ŽCMC. material. Hydrogen storage capacities of these materials were tested by volumetric and electrochemical methods. q 2002 Elsevier Science B.V. All rights reserved. Keywords: Carbon nanotubes; Functional materials; Hydrogen storage; Electron microscopy 1. Introduction Carbon nanotubes have interesting physical properties such as high mechanical stability‚ large
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Henry Cavendish‚ hydrogen is the most abundant element on earth and is an essential element for life. This element makes up about 90% of all atoms‚ the most popular being water. Today‚ it is seen as the clean fuel of the future‚ is used in products such as fertilizer‚ and it helps aid in the production of plastics‚ pharmaceuticals‚ and even margarine. Also‚ hydrogen’s low density makes it a natural choice for filling balloons and airships (Robertson 6-10). The molar volume of hydrogen gas is reliant
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Forces Class S (Water-soluble) Compounds Acetone Water Hydrogen Bonding & London Dispersion Forces Diethyl Ether Dipole – Induced Dipole & London Dispersion Forces Ethyl Alcohol (Ethanol) Water Hydrogen Bonding & London Dispersion Forces Diethyl Ether Dipole – Induced Dipole & London Dispersion Forces Sucrose Water Hydrogen Bonding & London Dispersion Forces Class N (Neutral) Compounds Benzyl Alcohol Sulfuric Acid Hydrogen Bonding & London Dispersion Forces Benzaldehyde Sulfuric
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al Chain Reactions: Bromination of Arenes Introduction The purpose of the bromination of arenes was to determine the different reactivities of different hydrocarbons with different hydrogen atoms when reacted with bromine under free-radical substitution. The time it took for the bromine color to disappear was used to determine the order of reactivity of the different hydrocarbons. Data and Results The data of the 10 hydrocarbon tubes and the 2 control tubes with bromine and dichloromethane in
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UNIVERSITY OF CAMBRIDGE INTERNATIONAL EXAMINATIONS International General Certificate of Secondary Education CHEMISTRY Paper 1 Multiple Choice Additional Materials: Multiple Choice Answer Sheet Soft clean eraser Soft pencil (type B or HB is recommended) 0620/01 October/November 2008 45 Minutes *6400528663* READ THESE INSTRUCTIONS FIRST Write in soft pencil. Do not use staples‚ paper clips‚ highlighters‚ glue or correction fluid. Write your name‚ Centre number and candidate number on the
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quantitative‚ or measurable‚ relationships that exist in chemical formulas and also chemical reactions. In this experiment hydrogen gas will be produced from the reaction of a known mass of magnesium metal with an excess of hydrochloric acid. The theoretical number of moles of hydrogen gas may be calculated using stoichiometry and the balanced chemical equation. The theoretical volume of hydrogen gas may then be determined from the previously determined number of moles of gas by rearranging the ideal gas law
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INTRODUCTION From natural gas‚ crude oils‚ and other fossil materials such as coal‚ few intermediates are produced that are not hydrocarbon compounds. The important intermediates discussed here are hydrogen‚ sulfur‚ carbon black‚ and synthesis gas. Synthesis gas consists of a nonhydrocarbon mixture (H2‚CO) obtain- able from more than one source. It is included in this chapter and is fur- ther noted in Chapter 5 in relation to methane as a major feedstock for this mixture. This chapter discusses
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