January 10, 2025, 01:32:08 PM
Forum Rules: Read This Before Posting


Topic: Couple of conceptual chemistry problems  (Read 3005 times)

0 Members and 1 Guest are viewing this topic.

Offline govibe

  • Regular Member
  • ***
  • Posts: 59
  • Mole Snacks: +1/-4
Couple of conceptual chemistry problems
« on: June 04, 2007, 10:44:24 AM »
1) When you are trying to find the pH of a strong acid solution (assuming they give you the amount and molarity), you don't need to do an ICE box because you assume that everything will dissociate into 1 mole of conjugate acid (H+) and conjugate base? Do all strong acids/bases dissociate into H+ and base?

2) how do you perform weak acid strong base titrations differently than strong acid strong base titrations?

3) You only need to do an ICE box for weak acids and weak bases?

Offline Yggdrasil

  • Retired Staff
  • Sr. Member
  • *
  • Posts: 3215
  • Mole Snacks: +485/-21
  • Gender: Male
  • Physical Biochemist
Re: Couple of conceptual chemistry problems
« Reply #1 on: June 04, 2007, 05:09:20 PM »
1 and 3)  Strong acids and strong bases will fully dissociate so you do not need an ICE box.  For some strong acid, however, you may still need some ICE box calculations since the conjugate base of the strong acid may be an acid (example: H3PO4 --> H+ + H2PO42-, and H2PO4- is a weak acid).

2.  The main difference will that the equivalence point is no longer at pH 7, so you have to use an indicator that changes color at the correct pH (or better, use a pH meter).

Sponsored Links