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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 quantity of heat liberated of absorbed when one mole of compound is formed in its standard state from its elements in their standard state is known as standard heat of formatio
Since fluorine is very electronegative as a result hydrogen develop a very positive character. As a result the H-bonding is very tough because of large difference in electronega
The series of elements involving the filling of 5f-orbitals is called actinoids series. They follow Ac (89) and include the fourteen elements from Th (90) and Lw (103). The chem
how to find hybridisation?i want shortcut or any trick
formaldehyde 10 N preparation?
Classification of polymers - On the basis of structure On the basis of structure of polymers these can be classified as (i) Linear polymers (ii) Branched chain polym
An Lewis acid-base dissociation of the bromide-essentially an SN1 reaction-gives an a-hydroxy carbo-cation, which is, by resonance, also the conjugate acid of acetophenone. Deproto
2. A mixture is prepared by adding 25.0 mL of 0.185 M Na3PO4 to 34.0 mL of 0.140 M Ca(NO3)2. (a) What mass of Ca3(PO4)2 will be formed? (b) What will be the concentrations of eac
Dear sir, We need your consultancy in a technical problem that we are confronting, and we would really appreciate your help We are in the process of implementing the heavy metal an
Uses of Proteins (a) Proteins constitute as necessary part of our food. Meat, eggs, fish, cheese offer proteins to human beings. (b) In textile: Casein (a milk protein) is u
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