Phosphoric acid, H, PO, (aq), is a triprotic acid, meaning that one molecule of the acid has pKa2 pKa3 pKa1 three acidic protons. Estimate the pH and the concentrations of all species in a 0.250 M phosphoric acid solution. 2.16 7.21 12.32 [H,PO,] = M [H*] = M [H,PO,] = M [OH] = M - TOOLS x10 [HPO ] = 6.2 x10-8 M pH = 1.34 [PO] = M

Chemistry: Principles and Practice
3rd Edition
ISBN:9780534420123
Author:Daniel L. Reger, Scott R. Goode, David W. Ball, Edward Mercer
Publisher:Daniel L. Reger, Scott R. Goode, David W. Ball, Edward Mercer
Chapter15: Solutions Of Acids And Bases
Section: Chapter Questions
Problem 15.30QE
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Phosphoric acid, H, PO, (aq), is a triprotic acid, meaning that one molecule of the acid has
pKal
pKa2
pKa3
three acidic protons. Estimate the pH and the concentrations of all species in a 0.250 M
phosphoric acid solution.
2.16
7.21
12.32
[H, PO,] =
M
[H*] =
M
[H,PO,] =
M
[OH¯] =
M
* TOOLS
x10
[HPO;" ] =
6.2 х10-8
1.34
M
pH =
[PO] =
M
Transcribed Image Text:Phosphoric acid, H, PO, (aq), is a triprotic acid, meaning that one molecule of the acid has pKal pKa2 pKa3 three acidic protons. Estimate the pH and the concentrations of all species in a 0.250 M phosphoric acid solution. 2.16 7.21 12.32 [H, PO,] = M [H*] = M [H,PO,] = M [OH¯] = M * TOOLS x10 [HPO;" ] = 6.2 х10-8 1.34 M pH = [PO] = M
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