Lecture 15 - 1 Titration of a weak acid using NaOH pH >...

Info iconThis preview shows pages 1–7. Sign up to view the full content.

View Full Document Right Arrow Icon

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
This is the end of the preview. Sign up to access the rest of the document.

Unformatted text preview: 1 Titration of a weak acid using NaOH pH > 7 at equivalence point (moles base = moles acid) Good indicator choice (Equiv. pt. = Endpoint) Poor indicator choice (Endpoint reached BEFORE equiv. pt) Titration of 25.0 ml of 0.100 M Acetic Acid 2 Titrate 50.0 ml of 0.200M Lactic Acid (pKa = 3.86) with 0.200M NaOH alculate pH after addition of the following: . Before addition of NaOH: . 10.0 ml NaOH: . 25.0 ml NaOH: . 49.0 ml NaOH: . 50.0 ml NaOH: . 51.0 ml NaOH: pH = 2.27 pH = 3.26 pH = 3.86 (pH = pK a halfway to equiv. pt) pH = 5.55 pH = 8.43 (equiv. point) pH = 11.30 3 Shapes of Titration Curves depend upon Ka Titration of 50.0 mL of 0.10 M Acid 4 Titrations of Polyprotic Acids, e.g., H 3 PO 4 Ka 1 = 7.5 x 10-3 , Ka 2 = 6.2 x 10-8 ; Ka 3 = 4.8 x 10-13 5 Titrations of Polyprotic Acids, e.g., H 3 PO 4 Ka 1 = 7.5 x 10-3 , Ka 2 = 6.2 x 10-8 ; Ka 3 = 4.8 x 10-13 6 8.8 Solubility Equilibria olubility Product, K sp :- Equilibrium constant for ions in saturated aqueous solution....
View Full Document

This note was uploaded on 04/16/2009 for the course CHEM 2150 taught by Professor Chirik,p during the Fall '08 term at Cornell University (Engineering School).

Page1 / 8

Lecture 15 - 1 Titration of a weak acid using NaOH pH >...

This preview shows document pages 1 - 7. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online