Question #db69c Chemistry Acids and Bases pH calculations 1 Answer Michael Nov 20, 2015 #[OH^-]=0.32"mol/l"# Explanation: #pK_w=pOH+pH# #:.14=pOH+13.5# #:.pOH=14-13.5=0.5# #:.-log[OH^-]=0.5# #:.log[OH^-]=-0.5# #10^(-0.5)=0.32# #:.[OH^-]=0.32"mol/l"# 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 1663 views around the world You can reuse this answer Creative Commons License