Páginas: 7 (1705 palavras) Publicado: 28 de abril de 2013
Avondale College

Science and Mathematics Papers and Journal Articles 1-1-1996 School of Science and Mathematics

Determination of The Molar Volume of Hydrogen from the Metal-Acid Reaction: An Experimental Approach
Kevin C. de Berg
Avondale College, kevin.deberg@avondale.edu.au

Follow this and additional works at: http://research.avondale.edu.au/sci_math_papersPart of the Science and Mathematics Education Commons Recommended Citation
de Berg, Kevin C., "Determination of The Molar Volume of Hydrogen from the Metal-Acid Reaction: An Experimental Approach" (1996). Science and Mathematics Papers and Journal Articles. Paper 11. http://research.avondale.edu.au/sci_math_papers/11

This Article is brought to you for free and open access by the School ofScience and Mathematics at ResearchOnline@Avondale. It has been accepted for inclusion in Science and Mathematics Papers and Journal Articles by an authorized administrator of ResearchOnline@Avondale. For more information, please contact marilyn.gane@avondale.edu.au.


Page 1 of 4

Record: 1 Title: Authors: Source: Document Type: Subject Terms: Abstract: Determination of the molarvolume of hydrogen from the metal-acid reaction: An experimental... de Berg, Kevin Chapman, Ken Australian Science Teachers Journal, 01/09/1996, Vol. 42 Issue 3, p58, 3p, 2 Diagrams, 1 Chart Article HYDROGEN MOLECULAR volume Presents a new approach to the determination of the molar volume of hydrogen from the metal acid reaction. Construction of the apparatus; Experimental details; Experimentalresults. 1294 00450855 9702271852 Australia/New Zealand Reference Centre Title located in library at S 507 AUS

Full Text Word Count: ISSN: Accession Number: Database: Notes: Section: Special notes

Introduction This article describes an alternative technique for determining the molar volume ofhydrogen from the metal-acid reaction in which the metal sample is encased in a specially prepared cage and a pipette filler is used to fill an inverted burette with water. The reaction between a metal and an acid has been used to determine the molar volume of hydrogen at room temperature and pressure using different techniques to that described here (Dietz, Tellefsen, Parry, & Steiner, 1977; Reed,1987; Sorsby, 1975; Teen & Ellis, 1978); to observe the effect of using different acids on the volume of hydrogen produced (Sorsby, 1975); to reinforce the 'activity series' for metals and hydrogen (Sorsby, 1975); to determine the rate law, activation energy, and stoichiometry for the reaction (Birk & Walters, 1993); and to determine the chemical equivalent of a metal (Bonatti, Zurita, & Solimo,1995). One of the procedures commonly employed, especially for magnesium, is to wrap the metal ribbon through a copper coil or around a small glass rod to prevent it from rising to the liquid surface inside an inverted gas measuring tube. The acid concentration is higher at the bottom of the inverted tube than at the top so that if metal rises to the liquid surface the reaction slows downsignificantly. This difference in acid concentration occurs when the gas measuring tube, containing the metal, has been filled with water, inverted over water, and acid finally added to the system to commence the




Page 2 of 4

reaction, or, a gas measuring tube is partially filled withacid, water is added to fill the tube, and then the metal inserted and the system inverted over water. However, even when the metal is supported at the bottom of the liquid column where acid concentration is higher, metal is eventually eaten away from the support as the reaction proceeds and the dislodged pieces of metal rise to the surface where it may take some time for the reaction to reach...
Ler documento completo

Por favor, assinar para o acesso.

Seja um membro do Trabalhos Feitos