One method to remove metals from water is to raise the pH and cause them to precipitate as their metal hydroxides.
(a) For the following reac-tion, compute the standard free energy of reaction:
(b) The pH of water was initially 6.8 and was then raised to 8.0. Is the dissolved cadmium concentration reduced to below 100 mg/L at the final pH? Assume the temperature of the water is 25°C.