World Journal of Chemical Education
ISSN (Print): 2375-1665 ISSN (Online): 2375-1657 Website: http://www.sciepub.com/journal/wjce Editor-in-chief: Prof. V. Jagannadham
Open Access
Journal Browser
Go
World Journal of Chemical Education. 2018, 6(2), 91-94
DOI: 10.12691/wjce-6-2-3
Open AccessArticle

Reactions of Precious and Inactive Metals with Acids

A. Sulcius1, , S. Gilmanshina2 and R. Sagitova2

1Kaunas University of Technology, Lithuania

2Kazan (Volga region) Federal University, Russia

Pub. Date: March 29, 2018

Cite this paper:
A. Sulcius, S. Gilmanshina and R. Sagitova. Reactions of Precious and Inactive Metals with Acids. World Journal of Chemical Education. 2018; 6(2):91-94. doi: 10.12691/wjce-6-2-3

Abstract

In chemistry, the redox reactions play an important role. While studying chemistry at the universities, much attention is paid to the problems of redox processes. One of the most important issues is the interaction of metals with solutions of strong acids. To qualitatively evaluate the possibility of dissolving a metal in strong acids, one can use the electrochemical series of metals. Metals, which are on the left side from hydrogen in electrochemical series, react with strong acids and release hydrogen. Sulfuric acid and nitric acid, depending on their concentration in the solution, react with metals, releasing a whole spectrum of gaseous products. Solution of many questions of redox reactions are addressed by memorizing responses or reaction algorithms. However, a person cannot remember everything, ones does not need. In order to help students to understand and write oxidation-reduction equations and avoid learning by heart, the authors suggest calculating the electromotive force (EMF) of redox reactions and then predicting their thermodynamic probability under standard and real conditions. In the article reactions of inactive and precious metals (Cu, Au and Pt) with strong acids using standard and stationary potentials of metals, which allow to calculate EMF and predict a “thermodynamically favourable” reaction without performing an experiment, are explained.

Keywords:
inactive and precious metals standard potential stationary potential electromotive force

Creative CommonsThis work is licensed under a Creative Commons Attribution 4.0 International License. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/

References:

[1]  Sulcius, A. Reactions of Metals in Nitric Acid: Writing Equations and Calculating Electromotive Force of Redox Reaction. J. Chem. Edu., 2015, 92 (12), 1971-1972.
 
[2]  Sulcius, A. Calculation of electromotive force in redox processes. World journal of chemical education, 2014, 2(2), 21-25.
 
[3]  Lidin, R. A., Savinkina, E. V., Ruk, N. S., Alikperova, L. Ju., Tests of inorganic and general chemistry with solutions (In Russian), Binom, Moscow, 2010, p. 230.
 
[4]  Hamman, C. H.; Hamnett, A.; Vielstich, W. Electrochemistry, 2nd ed.; Wiley-VCH: Hoboken, NJ, 2007; p 88.
 
[5]  DeMeo, St. Does Copper Metal React with Acetic Acid? J. Chem. Educ., 1997, 74(7), 884-886.
 
[6]  Massey, A. G. In Comprehensive Inorganic Chemistry; Trotman-Dickenson, A. F., Ed.; Pergamon: London, 1973; Vol. 3, p 18.
 
[7]  Tretjakov, A. Ju.; Martinenko, L. I.; Grigorjev, A. N.; Civadze, A. Ju. Inorganic chemistry: Chemistry of elements, V. 2, 2nd ed.; Moscow: MGU, 2007; p 670.
 
[8]  Волков A. И., Жарский И. M. Большой химический справочник. Минск: Современная школа, 2005. - 608 с.
 
[9]  Dobos, D. Electrochemical Data. A Handbook for Electrochemists in Industry and Universities; Kiado: Budapest, 1978; p 365.
 
[10]  Rumiancev, B. V. Oxidation-reduction properties of elements and their compounds in solutions; Lanj: St. Petersburg, 2017; p 356.
 
[11]  Rumiancev, B. V.; Usicenko, V. F. Redox Processes. Binom: Moscow, 2013; p 285.
 
[12]  Yue, G.; Zhao, L.; Olvera, O.G.; Asselin, E. Speciation of the H2SO4-Fe2(SO4)3-FeSO4-H2O system and development of an expression to predict the redox potential of the Fe3+/Fe2+ couple up to 150 °C. Hydrometallurgy, 2014, 147-148, p.p. 196-209.
 
[13]  Stransbury, E. E., Buchanan, R. A., Fundamentals of electrochemical corrosion, ASM International, Ohio, 2000; p. 489.