Question

Considering the pKa table, find the pH range for the following pH buffers. 1) HPO4 2-...

Considering the pKa table, find the pH range for the following pH buffers.

1) HPO4 2- + PO4 3-

and

2) HIO + IO-

Can someone answer and explain how they got it please?

1) pKa: 12.32/12.66
     Ka: 4.8/2.2×10^ -14

2) pKa: 0.80
     Ka: 1.6× 10^ -1

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Answer #1

A buffer solution is a mixture or combination of a weak acid or weak base and its salt .
Buffers help in maintaining the pH to a constant value on addition of small concentrations of H+/OH- to the solution.

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