AP Chem

An electrochemical cell consists of a nickel metal electrode immersed in a solution with [Ni2+] = 1.0 M separated by a porous disk from an aluminum metal electrode.
(a) What is the potential of this cell at 25°C if the aluminum electrode is placed in a solution in which [Al3+] = 7.3 10-3 M?
(b) When the aluminum electrode is placed in a certain solution in which [Al3+] is unknown, the measured cell potential at 25°C is 1.54 V. Calculate [Al3+] in the unknown solution. (Assume Al is oxidized.)

  1. 👍 0
  2. 👎 0
  3. 👁 432
asked by Halie
  1. a) Use the Nernst equation to calculate the Ni/Ni^+2 half cell potential. Do the same for the Al^+3/Al half cell potential.
    Add the two to obtain Ecell. I get -1.45v if I didn't make an error. You need to confirm that. Also you need to write the balanced equation for the cell AS WRITTEN, keeping in mind that it is negative which means it will not proceed spontaneously as written and as drawn.
    For part b, the directions tell you to make Al the oxidized electrode which means the cell is rearranged and will proceed spontaneously; you will need to adjust the signs of the numbers (as well as the equation) to fit.
    Ecell = 1.54v
    n = 6 electrons.
    You can fill in the values for components in Q.
    Ecell = Eocell -(0.0592/n)log Q

    1. 👍 0
    2. 👎 0
    posted by DrBob222

Respond to this Question

First Name

Your Response

Similar Questions

  1. Chemistry/Redox Reactions

    An electrochemical cell consists of a nickel metal electrode immersed in a solution with [Ni2+] = 1.0 M separated by a porous disk from an aluminium metal electrode immersed in a solution with [Al3+] = 1.0 M. Sodium hydroxide is

    asked by Hanna on August 18, 2008
  2. chem 2

    Consider a chromium-silver voltaic cell that is constructed such that one half-cell consists of the chromium, Cr, electrode immersed in a Cr(NO3)3 solution, and the other half-cell consists of the silver, Ag, electrode immersed in

    asked by Anonymous on May 29, 2014
  3. chem

    A voltaic cell consists of a strip of cadmium metal in a solution of Cd(NO3)2 in one beaker, and in the other beaker a platinum electrode is immersed in a NaCl solution, with Cl2 gas bubbled around the electrode. A salt bridge

    asked by sarah on April 13, 2013
  4. AP Chemistry

    This is the question I am having trouble with: A voltaic cell consists of a strip of lead metal in a solution of Pb(NO3)2 in one beaker, and in the other beaker a platinum electrode is immersed in a NaCl solution, with Cl2 gas

    asked by Sarah on April 20, 2015
  5. CHEM

    1.) What is the correct net cell reaction for the electrochemical cell diagramed below? Ni(s) ∣ Ni2+(aq) || Ag+(aq) ∣ Ag(s) a.) Ag+(aq) + Ni(s) ---> Ag(s) + Ni2+(aq) b.) Ag(s) + Ni2+(aq) ---> Ag+(aq) + Ni(s) c.) 2Ag+(aq) +

    asked by Amber on November 30, 2014
  6. chemistry

    A galvanic cell consists of an electrode composed of nickel in a 1.0 M nickel(II) ion solution and another electrode composed of silver in a 1.0 M silver ion solution, connected by a salt bridge. Calculate the standard potential

    asked by katie on February 27, 2012
  7. chemistry

    A galvanic cell consists of an electrode composed of nickel in a 1.0 M nickel(II) ion solution and another electrode composed of silver in a 1.0 M silver ion solution, connected by a salt bridge. Calculate the standard potential

    asked by katie on February 27, 2012
  8. college chemistry

    A galvanic cell is constructed with a silver-silver chloride electrode, and a nickel strip immersed in a beaker containing 4.97 x 10-2 M solution of NiCl2. Determine the balanced cell reaction and calculate the potential of the

    asked by jasmin on April 13, 2011
  9. Chemistry

    A galvanic cell is constructed with a silver-silver chloride electrode, and a nickel strip immersed in a beaker containing 7.44 x 10-2 M solution of NiCl2. Determine the balanced cell reaction and calculate the potential of the

    asked by Kayla on May 2, 2012
  10. chemistry (electrochemistry)

    1) For the following electrochemical cell Cu(s)|Cu2 (aq, 0.0155 M)||Ag (aq, 1.50 M)|Ag(s) write the net cell equation. Calculate the following values using standard potentials as needed. Eo cell and dGo for each

    asked by Andrew on April 15, 2013

More Similar Questions