i need the answer for the all quastions please

I NEED HELP

1- Knowing that at 25C, the following galvanic cell: PbPb(NO3)21MPbS 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. O2(g)+4H+(aq)+4Br(aq)2H2O(I)+2Br2(I) [E0red=+1.229V,E0x=1.077V, and Ecell=+0.063V] Calculate pH of the solution? 3-Using the table of standard reduction potentials, calculate G for the reaction Cu2+(aq)+Fe(s)Cu(s)+Fe2+(aq), Is this reaction spontaneous? 4- An acidic solution contains the ions Ce4+,VO2+, and Fe3+. Give the order of oxidizing ability of these species and predict which one will be reduced at the cathode of an electrolytic cell at the lowest voltage. 5- Compare the electrolysis products of molten CaCl2(I) and the electrolysis of an aqueous solution of CaCl2(aq). (Use E values in standard reduction potentials in electrochemical series.) 6- What products are formed at the anode and cathode, respectively, when each of the following solutions is electrolyzed? 7- A fuel cell uses the following reduction half-reactions. O2(g)+2H2O(I)+4e4OH(aq)E=0.401VCO32(aq)+7H2O(l)+8eCH4(g)+10OH(aq)E=0.110V 8- The standard EMF of a galvanic cell involving 3 moles of electrons in its redox reaction is 0.59V. Calculate the equilibrium constant for the reaction of the cell. 9- At 25oC , the cell Pt,H2 (1 atm) HCl (aq) AgCl,Ag has an emf of 0.332 at 250C. What is the pH of this solution? 1- Knowing that at 25C, the following galvanic cell: PbPb(NO3)21MPbS 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. O2(g)+4H+(aq)+4Br(aq)2H2O(l)+2Br2(l) [E0 red =+1.229V,E00x=1.077V, and E0 cell =+0.063V] Calculate pH of the solution? 3-Using the table of standard reduction potentials, calculate G for the reaction Cu2+(aq)+Fe(s)Cu(s)+Fe2+(aq), Is this reaction spontaneous? 4- An acidic solution contains the ions Ce4+,VO2+, and Fe3+. Give the order of oxidizing ability of these species and predict which one will be reduced at the cathode of an electrolytic cell at the lowest voltage. 5- Compare the electrolysis products of molten CaCl2(I) and the electrolysis of an aqueous solution of CaCl2 (aq). (Use E values in standard reduction potentials in electrochemical series.) 6- What products are formed at the anode and cathode, respectively, when each of the following solutions is electrolyzed? 7- A fuel cell uses the following reduction half-reactions. O2(g)+2H2O(I)+4e4OH(aq)Eo=0.401VCO32(aq)+7H2O(l)+8eCH4(g)+10OH(aq)Ea=0.110V 8- The standard EMF of a galvanic cell involving 3 moles of electrons in its redox reaction is 0.59V. Calculate the equilibrium constant for the reaction of the cell. 9- At 25oC, the cell Pt, H2(1atm)HCl(aq)AgCl,Ag has an emf of 0.332 at 25oC. What is the pH of this solution