Using the Ka values in Table 9.6, calculate the pH of a buffer that contains the given concentrations of a weak acid and its conjugate base.a.0.55 M CH3COOH and 0.55 M NaCH3COO BufferWeak AcidConjugate BaseKaAcetic acid/acetateCH3COOHCH3COO−1.8 × 10−5Bicarbonate/carbonateHCO3−CO32−5.6 × 10−11Dihydrogen phosphate/ hydrogen phosphateH2PO4−HPO42−6.2 × 10−8Hydrogen phosphate/ phosphateHPO42−PO43−2.2 × 10−13

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Answered: Using the Ka values in Table 9.6,…

General, Organic, and Biological Chemistry

7th Edition

ISBN:9781285853918

Author:H. Stephen Stoker

Publisher:H. Stephen Stoker

Chapter10: Acids, Bases, And Salts

Section: Chapter Questions

Problem 10.125EP: What is the pH of a buffer that is 0.150 M in a weak acid and 0.150 M in the acids conjugate base?...

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Using the K_a values in Table 9.6, calculate the pH of a buffer that contains the given concentrations of a weak acid and its conjugate base.

a.0.55 M CH₃COOH and 0.55 M NaCH₃COO

Buffer	Weak Acid	Conjugate Base	K_a
Acetic acid/acetate	CH₃COOH	CH₃COO⁻	1.8 × 10⁻⁵
Bicarbonate/carbonate	HCO₃⁻	CO₃²⁻	5.6 × 10⁻¹¹
Dihydrogen phosphate/ hydrogen phosphate	H₂PO₄⁻	HPO₄²⁻	6.2 × 10⁻⁸
Hydrogen phosphate/ phosphate	HPO₄²⁻	PO₄³⁻	2.2 × 10⁻¹³

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