Explanation The hexaaquairon(III) complex ion reacts with thiocyanate ion to form pentaquacyanatoiron(III)complex ion. (Fe(H 2 O) 6 ) 3+ (aq) + SCN − (aq) ⇋ (Fe(H 2 O) 5 SCN) 2+ The color of the pentaquacyanatoiron(III) complex ion [ F e ( H 2 O ) 5 S C N ] 2 + solution will be intense red. The wavelength at which the absorbance of the pentaquacyanatoiron(III) complexion is maximum is 490 nm. The light emitted at this wavelength is dark red in color,sothesolution appears intense red. The crystal field splitting energy ( Δ ) f o r [ F e ( H 2 O ) 5 S C N ] 2 + ion can be calculated using the given equation. The wavelength at which absorbance is maximum is 490 nm. Convert the wavelength from nm to m: 1 m = 10 9 n m . 490 n m × 1 m 10 9 n m = 490 × 10 − 9 m Now we will calculate the crystal field splitting energy ( Δ ) : Δ = h c λ Substituting the values, Δ = 6.626 × 10 − 34 J s × 3.00 × 10 8 m s 490 × 10 − 9 m = 4.1 × 10 − 19 J Thus, Δ = 4.1 × 10 − 19 J The complex [ F e ( H 2 O ) 6 ] 3 + ion produces a pale violet aqueous solution. The pale violet color is observed at the wavelength in the range of 430 to 300 nm. The complex [ F e ( H 2 O ) 6 ] 3 + ion produces a pale violet color, which is near to 300 nm. The wavelength at which [ F e ( H 2 O ) 5 S C N ] 2 + ion absorbs light is 490 nm

Chemistry: A Molecular Approach (4th Edition)

4th Edition

ISBN: 9780134112831

Author: Nivaldo J. Tro

Publisher: PEARSON

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Coordination Chemistry

It is a part of chemistry, in which the study of compounds that have central atoms surrounded by molecules or ions, known as ligand, is known as coordination chemistry.

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Chapter 25, Problem 86DIA

Interpretation Introduction

Introduction: The crystal field splitting energy (Δ) is given by:

Δ=hcλ

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Chapter 25 Solutions

Chemistry: A Molecular Approach (4th Edition)

Ch. 25 - Prob. 1SAQ Ch. 25 - Q2. Which metal has the highest first ionization...Ch. 25 - Prob. 3SAQ Ch. 25 - Prob. 4SAQ Ch. 25 - Prob. 5SAQ Ch. 25 - Prob. 6SAQ Ch. 25 - Prob. 7SAQ Ch. 25 - Prob. 8SAQ Ch. 25 - Prob. 9SAQ Ch. 25 - Prob. 10SAQ

Ch. 25 - Prob. 1E Ch. 25 - Prob. 2E Ch. 25 - 3. Why is the +2 oxidation state so common for...Ch. 25 - 4. Explain why atomic radii of elements in the...Ch. 25 - 5. Gold is the most electronegative transition...Ch. 25 - Prob. 6E Ch. 25 - Prob. 7E Ch. 25 - Prob. 8E Ch. 25 - Prob. 9E Ch. 25 - Prob. 10E Ch. 25 - Prob. 11E Ch. 25 - Prob. 12E Ch. 25 - Prob. 13E Ch. 25 - Prob. 14E Ch. 25 - Prob. 15E Ch. 25 - Prob. 16E Ch. 25 - 17. Write the ground state electron configuration...Ch. 25 - 18. Write the ground state electron configuration...Ch. 25 - Prob. 19E Ch. 25 - Prob. 20E Ch. 25 - Prob. 21E Ch. 25 - Prob. 22E Ch. 25 - Prob. 23E Ch. 25 - Prob. 24E Ch. 25 - Prob. 25E Ch. 25 - Prob. 26E Ch. 25 - Prob. 27E Ch. 25 - Prob. 28E Ch. 25 - Prob. 29E Ch. 25 - Prob. 30E Ch. 25 - Prob. 31E Ch. 25 - Prob. 32E Ch. 25 - Prob. 33E Ch. 25 - Prob. 34E Ch. 25 - Prob. 35E Ch. 25 - Prob. 36E Ch. 25 - Prob. 37E Ch. 25 - Prob. 38E Ch. 25 - Prob. 39E Ch. 25 - Prob. 40E Ch. 25 - Prob. 41E Ch. 25 - Prob. 42E Ch. 25 - Prob. 43E Ch. 25 - Prob. 44E Ch. 25 - Prob. 45E Ch. 25 - Prob. 46E Ch. 25 - Prob. 47E Ch. 25 - Prob. 48E Ch. 25 - Prob. 49E Ch. 25 - Prob. 50E Ch. 25 - Prob. 51E Ch. 25 - Prob. 52E Ch. 25 - Prob. 53E Ch. 25 - Prob. 54E Ch. 25 - Prob. 55E Ch. 25 - Prob. 56E Ch. 25 - 57. Recall from Chapter 8 that Cr and Cu are...Ch. 25 - 58. Most of the second row transition metals do...Ch. 25 - Prob. 59E Ch. 25 - Prob. 60E Ch. 25 - Prob. 61E Ch. 25 - Prob. 62E Ch. 25 - Prob. 63E Ch. 25 - Prob. 64E Ch. 25 - Prob. 65E Ch. 25 - Prob. 66E Ch. 25 - Prob. 67E Ch. 25 - Prob. 68E Ch. 25 - 69. When a solution of PtCl2 reacts with the...Ch. 25 - Prob. 70E Ch. 25 - Prob. 71E Ch. 25 - Prob. 72E Ch. 25 - Prob. 73E Ch. 25 - Prob. 74E Ch. 25 - Prob. 75E Ch. 25 - Prob. 76E Ch. 25 - Prob. 77E Ch. 25 - Prob. 78E Ch. 25 - 79. Which element has the higher ionization...Ch. 25 - Prob. 80E Ch. 25 - Prob. 81QGW Ch. 25 - Prob. 82QGW Ch. 25 - Prob. 83QGW Ch. 25 - Prob. 84QGW Ch. 25 - Prob. 85QGW Ch. 25 - Prob. 86DIA

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