An electrochemical cell consists of a standard hydrogen electrode and a copper m

Question

An electrochemical cell consists of a standard hydrogen electrode and a copper metal electrode. If the copper electrode is placed in a solution of 0.10 M NaOH that is saturated with Cu(OH)_2, what is the cell potential at 25 degree C? [For Cu(OH)_2, K_sp = 1.6 times 10^-19.] An electrochemical cell consists of a nickel metal electrode immersed in a solution with [Ni^2+] = 1.0 M separated by a porous disk from an aluminum metal electrode immersed in a solution with [Al^3+] = 1.0 M. Sodium hydroxide is added to the aluminum compartment, causing Al(OH)_3(s) to precipitate. After precipitation of Al(OH)_3 has ceased, the concentration of OH^- is 1.0 X 10^-4 M and the measured cell potential is 1.82 V. Calculate the Ksp value for Al(OH)_3. Al(OH)_3(s) doubleheadarrow Al^3+(aq) + 3OH^- (aq) Ksp = ?

Explanation / Answer

Tpo solve this problem we only need to tke in consideration the contribution of Aluminum. This is because the nickel does not pass rthe membrane. And the precipitation onky occurs with aluminum.

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