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SCAN0013 - A Higher Positive E° Reflects a Stronger Drive...

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Unformatted text preview: A Higher Positive E° Reflects a Stronger Drive to be Reduced and Greater Oxidizing Power for the Oxidizing Agent “91ng ewe: men!“ 6 Drive to be oxidized increases 5 2 Drive to be reduced increases 9 3 3 :3 3 A Lower Negative E“ Reflects a Stronger Drive to be Oxidized and Greater Reducing Power for the Reducing Agent {Tjsrileiiii warm ”flux wwgissii increases Drive to be reduced increases —) kldtalag mcrkwwawm 51>: Standard "ate-re. 4mm Appewdtx o:- F1 F? 6%»:th Newman gmegrsggatg 3- 3M “limel- g E: g: is @653 Clmeu c E = E — (RT/nF)ln[B]”/[A]a E = 5’3 — (O.D§915VIn)l09[BjW[A]“ at 25 C - In galvanic cells, it is the concentration of the reactants that determines the E_Ll' From Gibb’s free energy, D: # fifefljh'cr} 3 7, a [759ch (3; EM; “ E" » (RT/n F)ln() Where Q is the equilibrium quotient for the actual system at hand. Q ;_ B b Z A a - At 25 “C. EMI = E" -« (tl.(l5916in)iog0 The Nernst Eguation E: E a 5:} z: m a m . - “i § ‘t (:9 5, Q - For a halfreaction aA + ne- :1 bB —Q__‘W__i_. m 3""; - At equilibrium, Q = Km and 15cell = o - and F. 2 0.059161" lugK _ - Variables: n, E“, K. E AGm, 1 cell, 74 + 59W ben‘w m ...
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