Question: help 1 - Knowing that at 25C, the following galvanic cell: PbPb(NO;)21M || PbS saturated | Pb Shows an EMF=0.413; find the Ksp of PbS.

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1 - Knowing that at 25C, the following galvanic cell: PbPb(NO;)21M || PbS saturated | Pb Shows an EMF=0.413; find the Ksp of PbS. 2- Calculate the cell potential for the following reaction when the pressure of the oxygen gas is 2.50atm, and the bromide ion concentration is 0.25mol/L. O(g)+4H+(aq)+4Br(aq)2H2O(1)+2Br2(1) [E red =+1.229V,Eox=1.077V, and E cell =+0.063V ] Calculate pH of the solution

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