November 29, 2021, 03:59:45 AM
Forum Rules: Read This Before Posting


Topic: Calculate the pKa  (Read 104 times)

0 Members and 1 Guest are viewing this topic.

Offline liravsc

  • Regular Member
  • ***
  • Posts: 11
  • Mole Snacks: +0/-1
Calculate the pKa
« on: November 16, 2021, 06:25:27 PM »
"Find the pKa for an HA acid. The HA and A- concentrations are, respectively, 0.075 and 0.025. The pH is 6."

I used Henderson-Hasselbach's equation and got 6.477. Just want to check if that was correct. Studying for an exam after arriving 1 month late to class  :'(

Thank you.
« Last Edit: November 16, 2021, 06:43:31 PM by liravsc »
Never waste pure thoughts on an impure protein

Offline Borek

  • Mr. pH
  • Administrator
  • Deity Member
  • *
  • Posts: 26862
  • Mole Snacks: +1742/-403
  • Gender: Male
  • I am known to be occasionally wrong.
    • Chembuddy
Re: Calculate the pKa
« Reply #1 on: November 17, 2021, 02:54:42 AM »
Logic (and the value) is OK, you can get punished for significant digits though.
ChemBuddy chemical calculators - stoichiometry, pH, concentration, buffer preparation, titrations.info, pH-meter.info

Sponsored Links