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General Chemistry - Standalone boo...

11th Edition
Steven D. Gammon + 7 others
ISBN: 9781305580343

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BuyFindarrow_forward

General Chemistry - Standalone boo...

11th Edition
Steven D. Gammon + 7 others
ISBN: 9781305580343
Textbook Problem

An important component of blood is the buffer combination of dihydrogen phosphate ion and the hydrogen phosphate ion. Consider blood with a pH of 7.44.

  1. a What is the ratio of [H2PO4] to [HPO42−]?
  2. b What does the pH become if 25% of the hydrogen phosphate ions are converted to dihydrogen phosphate ion?
  3. c What does the pH become if 15% of the dihydrogen phosphate ions are converted to hydrogen phosphate ions?

(a)

Interpretation Introduction

Interpretation:

Blood is a buffer whose pH is 7.44 with the combination of dihydrogen phosphate ion and the hydrogen phosphate ion.

The ratio of [H2PO4-] to [HPO42-] has to be calculated

Concept Introduction:

Buffer:

A buffer is solution containing a mixture of two substances. A buffer solution is characterized by the tendency to resist changes in pH when some limited of amount of acid or base are added to it.

A buffer should possess either a weak acid and its conjugate anion that is a conjugate base (weak) or a weak base and its conjugate cation that is a conjugate acid (weak).

In a buffer solution, both the species that is an acid and a base exists in equilibrium.

Buffer solution has the tendency to join with both hydronium ion and hydroxide ion and therefore, it does not show changes in pH thereby resisting it.

Explanation

To Calculate: The ratio of [H2PO4-] to [HPO42-]

Given data:

Blood is the buffer with the combination of dihydrogen phosphate ion and the hydrogen phosphate ion.

The pH of blood is 7.44

Ratio of [H2PO4-] to [HPO42-] :

The hydronium ion concentration is calculated from the pH as follows,

[H3O+] =10pH =107.44 =3.63×108 M

The equilibrium reaction is:

H2PO4-(aq) + H2 H3O+(aq) + HPO42-(aq)

The Ka2 of phosphoric acid is 6

(b)

Interpretation Introduction

Interpretation:

Blood is a buffer whose pH is 7.44 with the combination of dihydrogen phosphate ion and the hydrogen phosphate ion.

The change in pH if 25% of the hydrogen phosphate ions are converted to dihydrogen phosphate ion has to be calculated

Concept Introduction:

Buffer:

A buffer is solution containing a mixture of two substances. A buffer solution is characterized by the tendency to resist changes in pH when some limited of amount of acid or base are added to it.

A buffer should possess either a weak acid and its conjugate anion that is a conjugate base (weak) or a weak base and its conjugate cation that is a conjugate acid (weak).

In a buffer solution, both the species that is an acid and a base exists in equilibrium.

Buffer solution has the tendency to join with both hydronium ion and hydroxide ion and therefore, it does not show changes in pH thereby resisting it.

(c)

Interpretation Introduction

Interpretation:

Blood is a buffer whose pH is 7.44 with the combination of dihydrogen phosphate ion and the hydrogen phosphate ion.

The change in pH if 15% of the dihydrogen phosphate ions are converted to hydrogen phosphate ion has to be calculated

Concept Introduction:

Buffer:

A buffer is solution containing a mixture of two substances. A buffer solution is characterized by the tendency to resist changes in pH when some limited of amount of acid or base are added to it.

A buffer should possess either a weak acid and its conjugate anion that is a conjugate base (weak) or a weak base and its conjugate cation that is a conjugate acid (weak).

In a buffer solution, both the species that is an acid and a base exists in equilibrium.

Buffer solution has the tendency to join with both hydronium ion and hydroxide ion and therefore, it does not show changes in pH thereby resisting it.

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Chapter 16 Solutions

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Sect-16.4 P-16.9ESect-16.4 P-16.3CCSect-16.5 P-16.4CCSect-16.5 P-16.10ESect-16.5 P-16.11ESect-16.6 P-16.12ESect-16.6 P-16.13ESect-16.6 P-16.5CCSect-16.6 P-16.6CCSect-16.7 P-16.14ESect-16.7 P-16.15ESect-16.7 P-16.16ECh-16 P-16.1QPCh-16 P-16.2QPCh-16 P-16.3QPCh-16 P-16.4QPCh-16 P-16.5QPCh-16 P-16.6QPCh-16 P-16.7QPCh-16 P-16.8QPCh-16 P-16.9QPCh-16 P-16.10QPCh-16 P-16.11QPCh-16 P-16.12QPCh-16 P-16.13QPCh-16 P-16.14QPCh-16 P-16.15QPCh-16 P-16.16QPCh-16 P-16.17QPCh-16 P-16.18QPCh-16 P-16.19QPCh-16 P-16.20QPCh-16 P-16.21QPCh-16 P-16.22QPCh-16 P-16.23QPCh-16 P-16.24QPCh-16 P-16.25QPCh-16 P-16.26QPCh-16 P-16.27QPCh-16 P-16.28QPCh-16 P-16.29QPCh-16 P-16.30QPCh-16 P-16.31QPCh-16 P-16.32QPCh-16 P-16.33QPCh-16 P-16.34QPCh-16 P-16.35QPCh-16 P-16.36QPCh-16 P-16.37QPCh-16 P-16.38QPCh-16 P-16.39QPCh-16 P-16.40QPCh-16 P-16.41QPCh-16 P-16.42QPCh-16 P-16.43QPCh-16 P-16.44QPCh-16 P-16.45QPCh-16 P-16.46QPCh-16 P-16.47QPCh-16 P-16.48QPCh-16 P-16.49QPCh-16 P-16.50QPCh-16 P-16.51QPCh-16 P-16.52QPCh-16 P-16.53QPCh-16 P-16.54QPCh-16 P-16.55QPCh-16 P-16.56QPCh-16 P-16.57QPCh-16 P-16.58QPCh-16 P-16.59QPCh-16 P-16.60QPCh-16 P-16.61QPCh-16 P-16.62QPCh-16 P-16.63QPCh-16 P-16.64QPCh-16 P-16.65QPCh-16 P-16.66QPCh-16 P-16.67QPCh-16 P-16.68QPCh-16 P-16.69QPCh-16 P-16.70QPCh-16 P-16.71QPCh-16 P-16.72QPCh-16 P-16.73QPCh-16 P-16.74QPCh-16 P-16.75QPCh-16 P-16.76QPCh-16 P-16.77QPCh-16 P-16.78QPCh-16 P-16.79QPCh-16 P-16.80QPCh-16 P-16.81QPCh-16 P-16.82QPCh-16 P-16.83QPCh-16 P-16.84QPCh-16 P-16.85QPCh-16 P-16.86QPCh-16 P-16.87QPCh-16 P-16.88QPCh-16 P-16.89QPCh-16 P-16.90QPCh-16 P-16.91QPCh-16 P-16.92QPCh-16 P-16.93QPCh-16 P-16.94QPCh-16 P-16.95QPCh-16 P-16.96QPCh-16 P-16.97QPCh-16 P-16.98QPCh-16 P-16.99QPCh-16 P-16.100QPCh-16 P-16.101QPCh-16 P-16.102QPCh-16 P-16.103QPCh-16 P-16.104QPCh-16 P-16.105QPCh-16 P-16.106QPCh-16 P-16.107QPCh-16 P-16.108QPCh-16 P-16.109QPCh-16 P-16.110QPCh-16 P-16.111QPCh-16 P-16.112QPCh-16 P-16.113QPCh-16 P-16.114QPCh-16 P-16.115QPCh-16 P-16.116QPCh-16 P-16.117QPCh-16 P-16.118QPCh-16 P-16.119QPCh-16 P-16.120QPCh-16 P-16.121QPCh-16 P-16.122QPCh-16 P-16.123QPCh-16 P-16.124QPCh-16 P-16.125QPCh-16 P-16.126QPCh-16 P-16.127QPCh-16 P-16.128QPCh-16 P-16.129QPCh-16 P-16.130QPCh-16 P-16.131QPCh-16 P-16.132QPCh-16 P-16.133QPCh-16 P-16.134QPCh-16 P-16.135QPCh-16 P-16.136QPCh-16 P-16.137QPCh-16 P-16.138QPCh-16 P-16.139QPCh-16 P-16.140QPCh-16 P-16.141QPCh-16 P-16.142QPCh-16 P-16.143QPCh-16 P-16.144QPCh-16 P-16.145QPCh-16 P-16.146QPCh-16 P-16.147QPCh-16 P-16.148QPCh-16 P-16.149QPCh-16 P-16.150QPCh-16 P-16.151QPCh-16 P-16.152QPCh-16 P-16.153QPCh-16 P-16.154QPCh-16 P-16.155QPCh-16 P-16.156QPCh-16 P-16.157QP

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