| MadSci Network: Chemistry |
I suggest that you add ammonium hydroxide. Add it slowly, dropwise, with
vigorous stirring, and monitor the pH during this.
The ammonia will form the Zinc diammine complex which will retard the
precipitation of the Zn hydroxide, and will also increase the pH.
Regards,
Charlie Crutchfield
Try the links in the MadSci Library for more information on Chemistry.