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Calculating pH of a base

  • Thread starter D.J Falcon
  • Start date
  • #1

Homework Statement


A strong base cane be assumed to be fully ionised in dilute solution. Use the Kw value to calculate the hydrogen ion concentration and hence the pH of a 0.15 M solution of potassium hydroxide, KOH.


Homework Equations





The Attempt at a Solution



Problem is, I don't know where to begin, so any advice on how to proceed or pointers would be appreciated.
 

Answers and Replies

  • #2
Yeah, I think I managed to do it meself. Forgot it was a strong base.

pOH=-log10[OH-]
pOH=-log10[0.15M]
pOH=0.824

pH+pOH=14 ∴ pH=14-0.824=13.176
 
  • #3
Borek
Mentor
28,305
2,688
Too many digits - 13.18 would be more to my liking. Other than that you did OK.
 

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