Phosphoric (H,PO4) is a triprotic acid with pKa values of 2.12, 7.21, and 12.32. It is solution for pH values near the pka values. You have a 0.100 M acid a useful buffer solution of phosphate buffer with a pH of 2.50. How many mL of 0.500 M NaOH solution must be added to 1.00 L of this buffer solution to convert it to a buffer at pH 7.70?

Principles of Modern Chemistry
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Author:David W. Oxtoby, H. Pat Gillis, Laurie J. Butler
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Chapter15: Acid–base Equilibria
Section: Chapter Questions
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Phosphoric
(H,PO4) is a triprotic
acid with pKa values of
2.12, 7.21, and 12.32. It
is
solution for pH values
near the pka values.
You have a 0.100 M
acid
a
useful
buffer
solution of phosphate
buffer with a pH of 2.50.
How many mL of 0.500
M NaOH solution must
be added to 1.00 L of
this buffer solution to
convert it to a buffer at
pH 7.70?
Transcribed Image Text:Phosphoric (H,PO4) is a triprotic acid with pKa values of 2.12, 7.21, and 12.32. It is solution for pH values near the pka values. You have a 0.100 M acid a useful buffer solution of phosphate buffer with a pH of 2.50. How many mL of 0.500 M NaOH solution must be added to 1.00 L of this buffer solution to convert it to a buffer at pH 7.70?
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