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Calculate and K for each reaction.a. The reaction of

Chemistry: A Molecular Approach | 3rd Edition | ISBN: 9780321809247 | Authors: Nivaldo J. Tro ISBN: 9780321809247 1

Solution for problem 120E Chapter 18

Chemistry: A Molecular Approach | 3rd Edition

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Chemistry: A Molecular Approach | 3rd Edition | ISBN: 9780321809247 | Authors: Nivaldo J. Tro

Chemistry: A Molecular Approach | 3rd Edition

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Problem 120E

Calculate  and K for each reaction.

a. The reaction of Cr2+(aq) with Cr2O72-(aq) in acid solution to form Cr3+(aq).

b. The reaction of Cr3+(aq) and Cr(s) to form Cr2+(aq). [The electrode potential of Cr2+(aq) to Cr(s) is -0.91 V. ]

Step-by-Step Solution:
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CHMY 141 Notes Lesson30,31,33 Lesson 30 How can the Three-Dimensional Arrangement of Atoms in Molecules be Predicted ● Moleculargeometry:themoreprecisetermusedtodescribetheshapeofamolecule ● ValenceShellElectron-PairRepulsionTheory,VSEPR ○ ThebasicideaofVSEPRisthattheelectronpairswedrawinLewisdiagramsrepeleachotherinrealmolecules.Therefore,theydistributethemselves inpositionsaroundthecentralatomthatareasfarawayfromeachotheraspossible ● Electron-pairgeometry:thearrangementofelectronpairsofamolecule ● electron-pairangle:theangleformedbyanytwoelectronpairsandthecentralatom ● Moleculargeometrydescribestheshapeofamoleculeandthearrangementofatomsaroundacentralatom ● Bondangle:thebondanglebetweentwobondsformedbythesamecentralatom ● Experimentalevidenceshowsthatthetwoorthreeelectronpairsinamultiplebondbehaveasasingleelectronpairinestablishingmoleculargeometry. Evidently,thesecondandthirdelectronpairsindoubleandtriplebondsdon’taffectthemoleculargeometry ● Thenumberofregionsofelectrondensitysurroundingacentralatomestablishesitsmoleculargeometry,notthenumberofelectronpairs.Aregionof electrondensitymaybeasingle,double,ortriplebond. ● Apolarmoleculesioneinwhichthereisanasymmetricaldistributionofcharge ○ amoleculehasanasymmetricaldistributionofchargeifchargedistributionis unbalanced ○ Ingeneral,anydiatomicmoleculeinwhichthetwoatomsdifferfromeachotherwillbeatleastslightlypolar ● Nonpolar:thecancellationofthepolarbondsresultsinnooverallregionsofpositiveandnegativecharge,ornonetdipolemoment

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Chapter 18, Problem 120E is Solved
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Textbook: Chemistry: A Molecular Approach
Edition: 3
Author: Nivaldo J. Tro
ISBN: 9780321809247

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Calculate and K for each reaction.a. The reaction of