At 25 °C, how many dissociated H+ ions are there in 345 mL of an aqueous solution whose pH is 11.87?

- "the acute form of diverticulitis can manifest itself with one or more severe attacks of infection and inflammation.

the inflammation of diverticulitis can eventually result in a bowel obstruction, which may cause constipation, thin stools, diarrhea, abdominal swelling or bloating, and abdominal pain."