Solution Manual for Quantitative Chemical Analysis
Solution Manual for Quantitative Chemical Analysis
9th Edition
ISBN: 9781464175633
Author: Daniel Harris
Publisher: Palgrave Macmillan Higher Ed
Question
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Chapter 12, Problem 12.3P

(a)

Interpretation Introduction

Interpretation:

At 9.0pH , the conditional formation constant for Mg(EDTA)2- should be calculated.

Concept Information:

Conditional Formation Constant:

In the reaction of metal with ligand, the equilibrium constant is called as formation constant or the stability constant.

MYn4-MYn++Y4-

The formation constant for above complex reaction is,

Kf=[MYn-4][Mn+][Y4-]

Where,

Kf is formation constant

[M+] is concentration of metal ion

[Y4-] is concentration of ligand

[MYn4-] is concentration of the acid

Degree of dissociation:

The ratio of mole of reactant that underwent to dissociating to mole of initial reactant is known as degree of dissociation.

In EDTA the degree of dissociation is,

αY4-=[Y4-][H6Y2+]+[H5Y+]+[H4Y]+[H3Y-]+[H2Y2-]+[H3Y3-]+[Y4-]=[Y4-][EDTA]

If pH is fixed, the αY4- is constant and Kf will be Kf'

The formation constantKf'=αY4-Kf=[MYn-4][Mn+][EDTA]

Where,

Kf' is the conditional formation constant

(b)

Interpretation Introduction

Interpretation:

At 9.0pH , the concentration of Mg2+ ion should be calculated.

Concept Information:

Conditional Formation Constant:

In the reaction of metal with ligand, the equilibrium constant is called as formation constant or the stability constant.

MYn4-MYn++Y4-

The formation constant for above complex reaction is,

Kf=[MYn-4][Mn+][Y4-]

Where,

Kf is formation constant

[M+] is concentration of metal ion

[Y4-] is concentration of ligand

[MYn4-] is concentration of the acid

Degree of dissociation:

The ratio of mole of reactant that underwent to dissociating to mole of initial reactant is known as degree of dissociation.

In EDTA the degree of dissociation is,

αY4-=[Y4-][H6Y2+]+[H5Y+]+[H4Y]+[H3Y-]+[H2Y2-]+[H3Y3-]+[Y4-]=[Y4-][EDTA]

If pH is fixed, the αY4- is constant and Kf will be Kf'

The formation constantKf'=αY4-Kf=[MYn-4][Mn+][EDTA]

Where,

Kf' is the conditional formation constant

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When an unknown amine reacts with an unknown acid chloride, an amide with a molecular mass of 163 g/mol (M* = 163 m/z) is formed. In the infrared spectrum, important absorptions appear at 1661, 750 and 690 cm. The 13C NMR and DEPT spectra are provided. Draw the structure of the product as the resonance contributor lacking any formal charges. 13C NMR DEPT 90 200 160 120 80 40 0 200 160 120 80 40 0 DEPT 135 T 200 160 120 80 40 0 Draw the unknown amide. Select Dow Templates More Frage
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