Final answer:
Raising the pH will not cause precipitates, including calcium carbonate, as it is more soluble in acidic conditions.
Step-by-step explanation:
The statement 'Raising the pH will cause precipitates (mostly calcium carbonate)' is False. When the pH of a solution is raised, it becomes more basic. Calcium carbonate is more soluble in acidic conditions, so raising the pH would actually decrease the likelihood of calcium carbonate precipitating. It is important to note that the solubility of calcium carbonate is markedly increased in acidic solutions, not basic solutions.