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The galvanic cells in which electrodes are made of same metal but they are immersed in the electrolytes of different concentrations in two half cells are called concentration cells. The difference in the concentrations of electrolytes in the two half cells, creates potential difference across the two electrodes. The electrode which is placed in electrolyte of larger concentration acts as cathode or + terminal. Whereas electrode which is placed in electrolyte of lower concentration acts as anode or -ve terminal.The cell can be represented as Cu/CuSO4 (0.01 M) ? CuSO4 (1 M)/Cu or simply as Cu/Cu2+ (0.01 M) ? Cu2+ (1 M)/Cu.Similarly, hydrogen ion concentration cell can be constituted by connecting hydrogen electrodes placed in hydrochloric acid solutions of different concentration. It can be represented as Pt, H2 (1 bar)/H+ (0.01 M) ? H+ (1 M)/H2 (1 bar), Pt.Ecell of concentration cellConsider the consideration cell of the type M/Mn+ (C1) ? Mn+(C2)/M. since standard electrode potentials of the two electrodes cancel each other, the emf of the cell can be written on the basis of Nerst equation as Ecell = (0.059/n) log C2/C1Evidently, for Ecell to be positive C2 > C1.
The word "cereal" is derived from the name of the Roman grain or harvest goddess, Ceres. Cereals are the seeds of the grass family. These are the complex carbohydrates and consist
Avogadro''s hypothesis?
Uses of Benzaldehyde - Aldehydes and Ketones Benzaldehyde is used, (a) In perfumery (d) In manufacture of dyes (c) In preparation of benzoic acid, cinnamic acid, cinna
what are the uses of alcohol
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a) Write the following about protein synthesis: (i) Name the location where protein synthesis occurs. (ii) How do 64 codons code for only 20 amino acids? (iii) Which of t
the periodic table
unit of ell constant .
Problem 1: What do you meant by Gas Chromatography? Show the quantitative applications of gas chromatography. Definition of Gas Chromatography Briefly explain about Q
method of preparation and characteristics of ethane
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