if two substances of different pH levels were combined, how would you calculate the final pH of the combination? example: a substance of pH 9, and a substance of pH 10, what is the final pH level?
2007-03-14 15:08:00 · 2 answers · asked by aznboardergirl 3 in Science & Mathematics ➔ Chemistry
You need to have more info. If they are strong electrolytes then it's not a big problem You find the total mole of H+ after mixing then divide by the total volume and you have the [H+] that you will plug-in the pH=-log[H+]. (If you mix two acids or two bases then you calculate and add the number of mole H+ of each solution; if you mix an acid and a base you find which is in excess and what remains)
If you have weak electrolytes then you need to know the Ka or Kb values and finding the pH is more tricky.
2007-03-15 01:06:39 · answer #1 · answered by bellerophon 6 · 1⤊ 0⤋
first of all the ph 10 will rule on your soluation the fond the finaly PH you should add use PH 10 as starting conc. add to it the H+ come from PH 9 also you need Ka for them
Ka =[H][X]
2007-03-21 15:04:25 · answer #2 · answered by maherrashdan 2 · 0⤊ 0⤋