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Homework Help: Galvanic cell

  1. May 4, 2015 #1
    1. The problem statement, all variables and given/known data
    A is an aqueous solution of KCl(aq) with unknown concentration. The
    following experiment was carried out at 25°C to determine the concentration
    of Cl- (aq) in A, and the Ksp of AgCl(s)

    Step 1: A half-cell was made by dipping a silver strip into 100.0 cm3
    of A.

    Step 2: A galvanic cell was constructed by connecting the half-cell made in
    Step 1 to a standard Zn2+(aq)  Zn(s) half-cell with a suitable salt bridge.

    Step 3: 0.100 M of AgNO3(aq) was added in portions from a burette to A. After
    each addition of AgNO3(aq), the emf of the galvanic cell was measured.

    When 8.0 cm3
    of AgNO3(aq) had been added to A, what is the cell emf
    (E) and the concentration of Ag+(aq) and Cl-
    (aq) in the resultant solution?

    2. Relevant equations

    3. The attempt at a solution
    i just simply cal the [Ag+] added to the solution and by (mole added)/[total volume (108cm3)]
    and [Cl-] by (mole remained after reaction)/[total volume(108cm3)]
    is it correct? or need other specific equation to cal this problem?
  2. jcsd
  3. May 4, 2015 #2


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