M- pH Buffers and Titration

M pH Buffers and - Melody Samuel-Boutros PHS 2301 8:00 10:50 AM Title pH Buffers and Titration Objective The purpose of this experiment is to make

Info iconThis preview shows pages 1–2. Sign up to view the full content.

View Full Document Right Arrow Icon
Melody Samuel-Boutros PHS 2301- 8:00- 10:50 AM Title: pH Buffers and Titration Objective: The purpose of this experiment is to make us examine the different buffers and mark their buffer range. Methods: Refer to lab handout, page 5 Results : See graphs attached Discussion and References: A buffer is an equilibrium mixture of conjugate weak acid/base pair designed to resist change in pH. A good buffer will withstand change in pH. Water did not do this during the experiment. In the first 0.5mL addition of acid, the pH value went from 7.85 to 3.49. Phosphate was a much better buffer, it took a much longer time to change the pH than the carbonate. It had a greater “buffer range.” Buffer range is the range in pH where it is most effective. Questions: 1. Which flask needed the least acid to effect a change? Water needed the least acid to effect change. 2. Which flask needed the most acid to effect a change? Phosphate needed the most acid to effect change.
Background image of page 1

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

View Full DocumentRight Arrow Icon
Image of page 2
This is the end of the preview. Sign up to access the rest of the document.

This note was uploaded on 03/09/2011 for the course PHS 2301 taught by Professor Bohu during the Spring '11 term at St. John's.

Page1 / 5

M pH Buffers and - Melody Samuel-Boutros PHS 2301 8:00 10:50 AM Title pH Buffers and Titration Objective The purpose of this experiment is to make

This preview shows document pages 1 - 2. Sign up to view the full document.

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