In a solution, which contains zinc and copper sulfate, a precipitate occurs

This is a nice example that matches the IPSA lecture in Diepenbeek. We must start with the analysis (plausibility and rationale) of this composition. This composition; Which bears the name of Blue Water, is used for the treatment of pyodermieên and infected eczemen. The presence of boric acid and boron makes the preparation, which is pharmacological obsolete anyway, discusible. After all, in many countries the use of boric acid is forbidden, unless for ophthalmological use. Nor can we argue that there are no better alternatives here. For animals, the preparation could be accepted.

Boric acid is a buffer mixture and, given a precipitate, we can conclude that the solution is Alcalisch. Many antibacterial effects will not be there; Boric acid is already a weak antibacterial substance.

on the one hand, you need to make a solution in   50 ml of boric acid water (solution A) and a solution B with copper and zinc sulfate   back in 50 ml. Water but delivered in a bottle of 100 ml.   One writes For that the 2 solutions are mixed for the delivery. You can also let the customer do this.   for application, the bottle is shuffled.     This is a composition from the old box.