March 28, 2024, 10:54:05 AM
Forum Rules: Read This Before Posting


Topic: Which cation will precipitate first/concentration when it does  (Read 1569 times)

0 Members and 1 Guest are viewing this topic.

Offline sriccomini

  • Very New Member
  • *
  • Posts: 1
  • Mole Snacks: +0/-0
Na2CO3 is added to a sol'n containing .02M BaCl2 and .003M CaCl2.
a) Which cation will precipitate first, Ba2+ or  Ca2+, as the concentration of Na2CO3 is increased?
b) Determine the concentration of CO3 2- at which precipitation begins. Given  Ksp (BaCO3) = 2.6E-9 and Ksp (CaCO3) = 5.0E-9

I know that if the cations are of equal concentration, a) can be determined simply from comparing Ksp values, but I'm unsure how to do this problem with different concentrations...

Offline Borek

  • Mr. pH
  • Administrator
  • Deity Member
  • *
  • Posts: 27637
  • Mole Snacks: +1799/-410
  • Gender: Male
  • I am known to be occasionally wrong.
    • Chembuddy
Re: Which cation will precipitate first/concentration when it does
« Reply #1 on: June 09, 2013, 04:38:38 PM »
Do b first.
ChemBuddy chemical calculators - stoichiometry, pH, concentration, buffer preparation, titrations.info

Sponsored Links