What is the pH of a #7.5x10^-3 M3 #H^+# solution? Chemistry Acids and Bases pH calculations 1 Answer anor277 Aug 31, 2016 #pH=2.13# Explanation: #pH=-log_10[H_3O^+]# #=# #-log_10(7.5xx10^-3)# #=# #-(-2.13)# #=# #2.13# 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 8827 views around the world You can reuse this answer Creative Commons License