Pre calculus mathematics

Question

If a sample of a certian solution is dermined to have [H3O] concentration of 4.45×10^_11 moles /liter, what is its ph ?

Answer 1

Well, the pH formula is -Log[H+]... where H+ is in moles per liter. The question looks weird, so I'll provide the two possible answers: if you mean a [H3O+] concentration of 4.45×10^11 moles /liter, then you get a pH of -11.64. Super acidic!

On the other hand, it was likely a typo, and you meant: a [H3O+] concentration of 4.45×10^-11 moles /liter, in which case you get a pH of 10.35. A basic solution.