What is the pH of a #8.7*10^-12# #M# solution? Chemistry Acids and Bases pH calculations 1 Answer anor277 Jul 2, 2016 I assume that #[H_3O^+]=8.7xx10^(-12)# in water under standard conditions. Explanation: In aqeuous solution, #pH=-log_10[H_3O^+]# #=# #-log_10(8.7xx10^-12)# #=# #-(-11.06)# #=# #11.1# 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 2502 views around the world You can reuse this answer Creative Commons License