chemistry

an electrochemical cell uses Al and Al+3 in one compartment and Ag and Ag+ in the other

write a balanced equation for the rxn that will occur spontaneously in this cell



would that just be Al + Al+3 + 2e --> Ag + Ag+ ?

  1. 👍 0
  2. 👎 0
  3. 👁 61
asked by erin
  1. Not quite.
    The half equations you want are as follows:
    Al ==> Al^+3 + 3e
    Ag^+ + e ==> Ag
    =================
    Multiply equation 1 by 1 and equation 2 by 3 (to make the electrons equal).
    Al ==> Al^+3 + 3e
    3Ag^+ + 3e ==> 3Ag
    ===================
    Now add them.
    Al + 3Ag^+ + 3e ==> Al^+3 + 3e + 3Ag
    Now cancel the electrons (since there are 3 on each side). That gives you the final equation.

    1. 👍 0
    2. 👎 0

Respond to this Question

First Name

Your Response

Similar Questions

  1. chemistry

    Consider an electrochemical cell based on the reaction: 2H+(aq) + Sn(s) = Sn2+(aq) + H2(g). Which of the following actions would NOT change the measured cell potential? lowering the pH in the cathode compartment addition of more

    asked by danny on April 16, 2015
  2. chemistry

    Consider an electrochemical cell based on the reaction: 2H+(aq) + Sn(s) = Sn2+(aq) + H2(g). Which of the following actions would NOT change the measured cell potential? lowering the pH in the cathode compartment addition of more

    asked by danny on April 19, 2015
  3. Chemistry

    A cell was constructed with two lead electrodes. The electrolyte compartment is 1 M Pb(NO3)2 (aq). In the other compartment, NaI has been added to a Pb(NO3)2 solution until a yellow precipitate forms and the concentration of I-

    asked by Anonymous on February 28, 2014
  4. Chemistry

    3. The diagram shows an electrochemical cell with a gold strip (left) and aluminum glasses (right). In your response, do the following: • Label the cathode and the anode, including the charge on each. • Show the flow of

    asked by kat on May 13, 2016
  5. Chemistry

    A concentration cell consists of two Al/Al+3 electrodes. The electrolyte in compartment A is 0.05M Al(NO3)3 and in compartment B is 1.25 M Al(NO3)3. What is the voltage of the cell at 25 degrees Celcius?

    asked by Jackie on July 20, 2012
  6. chemistry

    consider the following electrochemical cell: Pt(s) | Hg2^2+ (0.250M), Hg^2+ (0.800M) || MnO4^-(0.650M), H^+ (1.00M), Mn^2+ (0.375M) | Pt(s) Using the half-reaction method, write a balanced chemical equation for the electrochemical

    asked by Help Please!!!! on August 26, 2018
  7. CHEMISTRY

    Cant figure this out, I feel like the answer I keep getting is way too low. A voltaic cell is constructed that is based on the following reaction: Sn2+ (aq) +Pb(s) = Sn(s) + Pb2+ (a) If the concentration of Sn2+ in the cathode

    asked by jo on November 30, 2012
  8. 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
  9. chemistry

    The reaction described by the equation Zn + Hg2Cl2 2Hg +Zn+2 + 2Cl is run on electrochemical cell. The E^0 of the cell at 25 degrees C is 1.03V. In the same cell, [Cl-]=.10 M and [Zn+2] is unknown, and the measured cell voltage is

    asked by Dylan on April 12, 2012
  10. Chemistry

    The addition of aqueous ammonia to the cathode compartment of the cell described below reduces the cell potential. Likewise, the addition of aqueous ammonia to the anode compartment increases the cell potential.

    asked by Annie on May 4, 2009

More Similar Questions