N⁣S⁣p⁣o⁣n⁣s⁣o⁣r⁣five⁣e⁣ ⁣d⁣⁣D⁣C⁣ ⁣B⁣Y⁣ ⁣K⁣U⁣⁣ ⁣⁣G⁣Y⁣⁣⁣ The Henderson-Hasselbalch equation relates pKa and pH. On the other hand, it is just an approximation and shouldn't be used for concentrated solutions or for extremely very low pH acids or substantial pH bases. Warning: Stay away from using 3rd-celebration filters with your PUR pitcher http://mylessxcim.blogvivi.com/10322536/helping-the-others-realize-the-advantages-of-invigorated-water