- Convert concentrations to number of moles
- Subtract the smaller n from the larger n
- Calculate -log (difference÷total volume)
- If the larger n is of the acid, the result is the pH. Otherwise, it's the pOH.
If there's more weak acid than strong base:
- Subtract the two n's.
- C _{conjugate base} = n _{strong base} ÷ total volume
- C _{weak acid} = difference ÷ total volume
- Using the ICE table and the ka, calculate the new concentration of H+
- pH=-log (H+)
- C _{conjugate base}= n _{strong base} ÷ total volume
- k_{b} = k_{w} ÷ k_{a}
- [OH-] = square root of (k_{b}* C_{conjugate base})
- pH = 14 + log [OH-]
If there's more strong base than weak acid
- Find the difference between the two n's
- Divide the difference by the total volume
- pH = 14 + log [quotient]
Weak base+ Strong Acid Tritation
The steps are the same as those of Weak Acid+ Strong Base Tritation.