Circular-Summer vacation
Dear Parents and Students, Kindly note that Summer vacation 2021-22 will begin from 1st May 2021 till 23rd May 2021. Regular Virtual online classes will commence from 24th May 2021. Regards, Class teacher
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Chemistry class - Topic taught as on 21/4/21
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Expression of Nernst Equation Nernst equation is an equation relating the capacity of an atom/ion to take up one or more electrons (reduction potential) measured at any conditions to that measured at standard conditions (standard reduction potentials) of 298K and one molar or one atmospheric pressure. Nernst Equation for Single Electrode Potential Ecell = E0 – [RT/nF] ln Q Where, Ecell = cell potential of the cell E0 = cell potential under standard conditions R = universal gas constant T = temperature n = number of electrons transferred in the redox reaction F = Faraday constant Q = reaction quotient The calculation of single electrode reduction potential (Ered) from the standard single electrode reduction potential (E°red) for an atom/ion is given by the Nernst equation. For a reduction reaction, Nernst equation for a single electrode reduction potential for a reduction reaction Mn+ + ne– → nM is; Ered = EMn+/M = EoMn+/M – [2.303RT/nF] log [1/[Mn+]] Where, R is the ...
Chemistry - Topic taught 20 April
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Electrochemistry is the branch of chemistry which deals with the relationship between electrical energy and chemical energy and inter-conversion of one form into another. 2. An electrochemical cell consists of two metallic electrodes dipped in electrolytic solutions. The cells are of two types: (a) Electrolytic cells (b) Galvanic cells 3. A galvanic cell consists of two half cells. Each half cell contains an electrolytic solution and a metallic electrode.The electrode at which- oxidation takes place is called an anode and the electrode at which reduction takes place is called the cathode. The half-cells are separated from each other by means of a porous pot or a salt bridge. What is Salt Bridge? A salt bridge is a device used in an electrochemical cell for connecting its oxidation and reduction half cells wherein a weak electrolyte is used. In other words, a salt bridge is a junction that connects the anodic and cathodic compartments in a cell or electrolytic solution....