If #[H_3O^+] = 8.26 times 10^-5# #M#, what is the pH of the solution? Chemistry Acids and Bases pH calculations 1 Answer anor277 May 31, 2017 #pH=4.08............# Explanation: #pH=-log_10[H_3O^+]# #=-log_10(8.26xx10^-5)=??# See this old answer for more details. 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 7945 views around the world You can reuse this answer Creative Commons License