Phosphoric Acid Titration Curves - Phosphoric Acid Titration Curves Anthony Upshaw Partner Brock Harris Chemistry 112L April 3rd 2016 A Research

Phosphoric Acid Titration Curves - Phosphoric Acid...

This preview shows page 1 - 4 out of 4 pages.

Phosphoric Acid Titration Curves Anthony Upshaw Partner: Brock Harris Chemistry 112L April 3 rd 2016
Image of page 1
A. Research Question: a) What is the exact initial concentration of the H 3 PO 4 solution? b) What are p K a1 & p K a2 for H 3 PO 4 ? c) What are K a1 & K a2 for H 3 PO 4 ? d) What is the H 3 PO 4 concentration in my soft drink? B. Observations & Results Tables Table 1. Phosphoric Acid Titration Data and Concentration Results [ NaOH] (M) Equiv point pH at equiv. point NaOH vol to Reach equiv Point (mL) NaOH Moles (mol) H 3 PO 4 Moles (mol) Starting [H 3 PO 4 ] ( M) Average [H 3 PO 4 ] ( M) .099 1 st 4.7 14.5 0.00144 0.0014 4 0.048 .025 .099 2 nd 9.3 28.5 0.0028 0.0028 0.0940 5 Table 2. Phosphoric Acid Equilibrium Constants. Equil # p K a K a 1 2.245 0.0057 2 11.4 3.98 x 10 -12 Table 3. Cola Soft drink titrations Data and Concentration Results for Sodastream Dr. Pete. [NaOH] ( M) Equiv point pH at equiv point NaOH vol to Reach equiv Point (mL) NaOH Moles (mol) H 3 PO 4 Moles (mol) Starting [H 3 PO 4 ] ( M) Average [H 3 PO 4 ] ( M) 0.05 1st 4.4 4.2 0.0021 0.0021 0.0525 .0856 0.05 2nd 8.4 9.5 0.0048 0.0048 0.1187 5 Graphs
Image of page 2
0 5 10 15 20 25 30 35 40 45 0 2 4 6 8 10 12 14
Image of page 3
Image of page 4

You've reached the end of your free preview.

Want to read all 4 pages?

  • Spring '14
  • pH, Pk, Phosphoric acid, Dr. Pete, Phosphoric Acid Titration, Sodastream Dr. Pete

  • Left Quote Icon

    Student Picture

  • Left Quote Icon

    Student Picture

  • Left Quote Icon

    Student Picture

Stuck? We have tutors online 24/7 who can help you get unstuck.
A+ icon
Ask Expert Tutors You can ask You can ask You can ask (will expire )
Answers in as fast as 15 minutes