The ph level of a substance can be determined by the formula ph = â€"log[h ], where [h ] is the hydrogen ion concentration in moles per liter. an alkaline substance has a ph level between 7 and 14. which ion concentration corresponds to an alkaline substance? 3.5 x 10â€"16 5.0 x 10â€"12 1.0 x 10â€"7 1.1 x 10â€"4