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Chemistry
10th Edition
ISBN:9781305957404
Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Publisher:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Chapter1: Chemical Foundations
Section: Chapter Questions
Problem 1RQ: Define and explain the differences between the following terms. a. law and theory b. theory and...
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Phosphoric acid is triprotic with the step-wise dissociation shown below. A 2.49M phosphoric acid solution
is prepared. Calculate the equilibrium concentrations of the species indicated. Report all answers in
scientific notation using 2 sig figs. Rather than use the quadratic equation, you can make assumptions like
we do in class (ie if K<<1, then 0.1-x - 0.1)
H3PO4
H2O
H¿PO,
Kal
7.5x10 -3
H3O+
H,PO,
H20 +
HPO
H30+
Ka2
6.2x10 -8
НРО
H20 +
PO
H3O+
Ka3 = 4.8x10 - 13
What is the pH of this solution?
Report pH as a number and not in
scientific notation.
Transcribed Image Text:Phosphoric acid is triprotic with the step-wise dissociation shown below. A 2.49M phosphoric acid solution is prepared. Calculate the equilibrium concentrations of the species indicated. Report all answers in scientific notation using 2 sig figs. Rather than use the quadratic equation, you can make assumptions like we do in class (ie if K<<1, then 0.1-x - 0.1) H3PO4 H2O H¿PO, Kal 7.5x10 -3 H3O+ H,PO, H20 + HPO H30+ Ka2 6.2x10 -8 НРО H20 + PO H3O+ Ka3 = 4.8x10 - 13 What is the pH of this solution? Report pH as a number and not in scientific notation.
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