Edexcel IAL Chemistry A2 14.11 Strong base pH using Kw or pKw
Edexcel IAL Chemistry A2 14.11 Strong base pH using Kw or pKw
Convert the base formula or mixture into [OH-] first, account for two hydroxide ions where needed and then use Kw, pKw or pOH to obtain the final pH.
How this is tested
- Double [OH-] for Ba(OH)2 or Sr(OH)2 before converting to pOH and pH values.
- Use Kw or pKw at the stated temperature to convert hydroxide concentration into pH.
- Calculate excess OH- after neutralisation or dilution before giving the final pH.