Q42 P Use the following data to determ... [FREE SOLUTION]

Chapter 23: Q42 P (page 1059)

Use the following data to determine if Cr²⁺(aq)can be prepared by the reaction ofwith Cr²⁺(aq):
$\begin{array}{rcl} C r^{3 +} (a q) + e^{-} C r^{2 +} (a q) E^{0} & = & - 0.41 V \\ C r^{3 +} (a q) + 3 e^{-} C r (s) E^{0} & = & - 0.74 V \\ C r^{2 +} (a q) + 2 e^{-} C r (s) E^{0} & = & - 0.91 V \end{array}$

Short Answer

Expert verified

$C r_{(a q)}^{2 +}$ can be formed from Cr_(a) and role="math" localid="1663393665913" width="41" height="30">Cr(aq)3+because the resulting $E_{e n l l}^{o}$ is positive.

Step by step solution

Definition of Coordination Compound

A coordination complex consists of a central atom or ion, which is typically metallic and is termed the coordination centre, and a surrounding array of bound molecules or ions, that are successively referred to as ligands or complexing agents.

Solve the given statements

Cr_(o) Is oxidized to $C r_{(a n)}^{3 +}$ , therefore it is the anode

role="math" localid="1663393826855" $E_{h a l f - o u t}^{o} = - 0.74 . C r_{(a)} 鈫� C r_{(a q)}^{3 +} + 3 e^{-}$

Cr³⁺ is then reduced to Cr²⁺, therefore it is at the cathode.

$E_{h a l f}^{o} - a n = - 0.41 C r_{(a q)}^{3 +} + e^{-} 鈫� C r_{(a)}^{2 +}$

Overall reaction: $C r_{(s)} + 2 C r_{(a)}^{3 +} 鈫� 3 C r_{(a (q)}^{2 +}$

$E_{o u l}^{0} = E_{r e d u c t i o n}^{0} - E_{o x i d a t i o n}^{0} E_{c e l l}^{0} = E_{c a t h o d e}^{0} - E_{a n o d e}^{0} E_{c e l l}^{0} = - 0.41 - (- 0.74) E_{c e l l}^{a} = 0.35 V$

The E_cell is positive, therefore the reaction can proceed spontaneously.

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Short Answer

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Definition of Coordination Compound

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91影视

Use the following data to determine if Cr2+(aq)can be prepared by the reaction ofwith Cr2+(aq):Cr3+(aq)+e-Cr2+(aq)E0=-0.41VCr3+(aq)+3e-Cr(s)E0=-0.74VCr2+(aq)+2e-Cr(s)E0=-0.91V

Short Answer

Step by step solution

Definition of Coordination Compound

Solve the given statements

One App. One Place for Learning.

Most popular questions from this chapter

Recommended explanations on Chemistry Textbooks

Kinetics

The Earths Atmosphere

Chemical Reactions

Organic Chemistry

Ionic and Molecular Compounds

Making Measurements

Study anywhere. Anytime. Across all devices.