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 added to the aluminium compartment causing Al(OH)3(s) to precipitate.
After precipitation of Al(OH)3 has ceased, the concentration of OH- is 1.0 . 10-4 M and the measured cell potential is 1.82 V. Calculate Ksp for Al(OH)3.