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The zinc-silver oxide battery, although expensive, is used to power satellite systems because of its light weight. Unbalanced half-reactions that occur in this battery are
Which equation represents the oxidation half-reaction? Which represents the reduction half-reaction? Add electrons to the appropriate side of each equation to account for the chance in oxidation number.
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EBK INTRODUCTION TO CHEMISTRY
- A potential of 0.142 V is recorded (under standard conditions) for a voltaic cell constructed using the following half reactions: Cathode: Pb2+(aq) + 2 e Pb(s) Anode: PbCl2(s) + 2 e Pb(s) + 2 Cl(aq) Net: Pb2+(aq) + 2 Cl(aq) PbCI2(s) (a) What is the standard reduction potential for the anode reaction? (b) Calculate the solubility product, Ksp, for PbCl2.arrow_forwardAn electrolytic cell is set up with Cd(s) in Cd(NO3)2(aq) and Zn(s) in Zn(NO3)2(aq). Initially both electrodesweigh 5.00 g. After running the cell for several hours theelectrode in the left compartment weighs 4.75 g. (a) Which electrode is in the left compartment? (b) Does the mass of the electrode in the right compartmentincrease, decrease, or stay the same? If the masschanges, what is the new mass? (c) Does the volume of the electrode in the right compartment increase, decrease, or stay the same? If the volumechanges, what is the new volume? (The density of Cd is8.65 g/cm3.)arrow_forwardDraw a diagram of each cell. Label the anode, the cathode, the species in each half-cell solution, the direction of electron movement in an external circuit, and thedirection of movement of ions within the cell. (a) Cu(s) | Cu2+(aq) || Fe2+(aq) |Fe(s) (b) Pt(s) | H2O2(aq), H+(aq) || Fe2+(aq), Fe3+(aq) | Pt(s)arrow_forward
- For the reaction Cu2+(aq) + Zn(s) → Cu(s) + Zn2+ (aq), why can’t you generate electric current by placing a piece of copper metal and a piece of zinc metal in a solution containing CuCl2(aq) and ZnCl2(aq)?arrow_forwardFor the following half-reactions, answer the questions below. Co3+(aq)+eCo2+(aq)E=+1.953VFe3+(aq)+eFe2+(aq)E=+0.769VI2(aq)+2e2I(aq)E=+0.534VPb2+(aq)+2ePb(s)E=0.127VCd2+(aq)+2eCd(s)E=0.402VMn2+(aq)+2eMn(s)E=1.182V (a) Which is the weakest reducing agent? (b) Which is the strongest reducing agent? (c) Which is the strongest oxidizing agent? (d) Which is the weakest oxidizing agent? (e) Will Pb(s) reduce Fe3+(aq) to Fe2+(aq)? (f) Will I-(aq) reduce Pb2+(aq) to Pb(s)? (g) Which ion(s) can be reduced by Pb(s)? (h) Which if any metal(s) can be oxidized by Fe3+(aq)?arrow_forwardWhat is the standard cell potential you would obtain from a cell at 25C using an electrode in which Hg22+(aq) is in contact with mercury metal and an electrode in which an aluminum strip dips into a solution of Al3+(aq)?arrow_forward
- A voltaic cell is constructed using the reaction of chromium metal and iron(II) ions. 2 Cr(s) + 3 Fe2+(aq) 2 Cr3+(aq) + 3 Fe(s) Complete the following sentences: Electrons in the external circuit flow from the ________ electrode to the ______ electrode. Negative ions move in the salt bridge from the ________ half-cell to the ______ half-cell. The half-reaction at the anode is _______ and that at the cathode is ________.arrow_forwardA voltaic cell is constructed in which one half-cell consists of a silver wire in an aqueous solution of AgNO3.The other half cell consists of an inert platinum wire in an aqueous solution containing Fe2+(aq) and Fe3+(aq). (a) Calculate the cell potential, assuming standard conditions. (b) Write the net ionic equation for the reaction occurring in the cell. (c) Which electrode is the anode and which is the cathode? (d) If [Ag+] is 0.10 M, and [Fe2+] and [Fe3+] are both 1.0 M, what is the cell potential? Is the net cell reaction still that used in part (a)? If not, what is the net reaction under the new conditions?arrow_forwardCalculate the potential developed by a voltaic cell using the following reaction if all dissolved species are 0.015 M. 2 Fe2+(aq) + H2O2(aq) + 2 H+(aq) 2 Fe3+(aq) + 2 H2O()arrow_forward
- The balanced half-reaction for Br2 BrO3 in basic solution is (a) 3 OH + Br2 2BrO3+ H2O + e (b) 12 OH + Br2 2 BrO3 + 6 H2O + 10 e (c) e + OH + Br2 2 BrO3 + H2O (d) l0e + Br2 + 6H2O 2BrO3 +6OHarrow_forwardConsider these half-reactions: (a) Which is the weakest oxidizing agent? (b) Which is the strongest oxidizing agent? (c) Which is the strongest reducing agent? (d) Which is the weakest reducing agent? (e) Will Sn(s) reduce Ag+(aq) to Ag(s)? (f) Will Hg() reduce Sn2+(aq) to Sn(s)? (g) Name the ions that can be reduced by Sn(s). (h) Which metals can be oxidized by Ag+(aq)?arrow_forward
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