Introduction In order to identify new materials‚ scientists use a variety of chemical and physical methods to determine molecular masses. One of these methods includes the Dumas method for determining the molecular weight of a volatile liquid. This method‚ which was proposed by John Dumas in 1826‚ makes use of a volatile liquid (vaporizes at a relatively low temperature) and allows this liquid to be heated in a water bath to a known temperature and escape from a flask through a tiny opening (Giunta
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Chemistry 11 Santa Monica College Determination of Molecular Mass via the Dumas Method Objectives: • To determine the molecular mass of an unknown volatile liquid using the Dumas method and the ideal gas law. Background: In the early 19th century‚ Jean-Baptiste Dumas‚ a distinguished French chemist‚ created a relatively simple method for determining the molecular mass of a volatile substance. In this experiment we will use a modified version of his technique to determine the molecular mass
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TIPAYNO‚ Samantha TORZAR‚ Precious Imee I. Signatures: ____________________ ____________________ ____________________ ____________________ Title: Determination of Molecular Weight of a Volatile Liquid By Vaporization: Dumas Method Background of the Study Problem In this experiment‚ an unknown liquid is in need to be identified and one of the key factors to identify it is to determine its molecular weight. In order to determine the molecular weight of a particular substance which in this experiment’s
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Aisne‚ France‚ Alexandre Dumas grew to become one of France’s most notable authors. His father‚ born in the French colony of Saint Domingue‚ located in the Caribbean‚ was a Creole general for the French Revolutionary armies‚ and his mother was the daughter of an inn-keeper. Given Thomas-Alexandre Dumas’s lineage of a mother who was of Afro-Caribbean ancestry‚ Alexandra Dumas himself was also a man of Afro-Caribbean descent through blood. At the tender age of four‚ Dumas lost his father to cancer
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The absurdity of the methanol economy I had not actually heard of it‚ but a colleague mentioned it in the course of conversation: George Olah‚ the Hungarian-born U.S. chemist whose research is focused on hydrocarbons‚ strongly advocates the introduction of methanol as a chemical energy carrier. The basic idea is that‚ to be sure‚ we need to find a replacement for the short chain alkanes that constitute the major part of gasoline‚ aviation spirit‚ etc.‚ and which are used as the source of motive
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Beginning with Science 02: Scientific Investigation For this assignment you will do two things: Part I: Evaluate one experimental design. (10 points) Part II: Design your own experiment using the scientific method. (40 points) Review each scenario below‚ and choose one to complete for your assignment. Each scenario contains specific questions that will ask you to provide examples‚ explain your suggestions for improvement‚ and refer to the lesson. Be sure to respond to each question in complete
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Methanol- Yes or No? Do you agree on building the world’s largest methanol plant in Tacoma‚ WA? Many people disagree‚ because the negative impacts far outweigh the positive ones. One negative impact is the plant would take up too much resource. In addition to that‚ the methanol plant will also change the environment. Here is how the two negative points can affect the world today. The first negative impact is the methanol plant will take a lot of resources. One detail to support the claim in “Redline
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Bethesda‚ MD. 1993. 2) U.S. Environmenal Protection Agency. Integrated Risk Information System (IRIS) on Methanol. National Center for Environmental Assessment‚ Office of Research and Development‚ Washington‚ DC. 1999. 3) Methanol Institute. (2011‚ July). Methanol health effects. Methanol Facts. Retrieved February 1‚ 2013‚ from http://www.methanol.org/Health-And-Safety/Safe-Handling/Methanol-Health-Effects.aspx 4) U. (1994‚ August). Chemicals in the Environment. EPA. Retrieved January/February
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OBJECTIVE: * To determine the molecular weight of a volatile liquid by using Dumas method. METHOD: MATERIAL | CHEMICALS | 125 mL Erlenmeyer flask | Known liquid (2-propanol) | Rubber band | Unknown liquid | Boiling chips | | Watch glass | | 100 mL graduated cylinder | | Pin | | 600 mL beaker | | Hot plate | | Thermometer | | Room temperature water | | 6 × 6 and 8 × 8 aluminium foil | | PROCEDURE: SAFETY * Lab Coat and Safety Goggles. * Keep the bottles
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Methanol(CH₃OH) is a simple compound which is also known as methyl alcohol or wood alcohol.Methanol is colourless‚flammable and most importantly very toxic.They are naturally produced from volcanic gases‚vegetation and microbes.They can also be produced in the industry by synthesizing gas.The largest and the most important use of methanol is as a feedstock in the plastic industry.They are used to make methanal and hence variety of plastics‚based on reactions with phenol‚carbamide(urea) and melamine
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