If the hydrogen ion concentration in a solution is 7.10 x 10^-5 mol/L, what is the pH? Chemistry Acids and Bases pH calculations 1 Answer anor277 Jan 25, 2017 pH~=4 Explanation: pH=-log_10[H_3O^+]. We are given that [H_3O^+]=7.10xx10^-5*mol*L^-1. And thus pH=-log_10(7.10xx10^-5)~=4 Answer link Related questions How do you determine ph of a solution? How do you determine pH at an equivalence point? How do you determine pH from molarity? What does alkalinity mean? What is a base? How do acid base indicators change color? What is a neutral pH? How does alkalinity affect pool water? Why is pH important in drinking water? How can I calculate the pH of a solution? See all questions in pH calculations Impact of this question 8485 views around the world You can reuse this answer Creative Commons License