Ignore Part A 1.) Consider the following reduction half-reactions.Cra-(aq) + 3 e → Cr(s)2 H;0(1) + 2 e → H:(g) + 2 OH(g)a.) Draw a diagram of a voltaic cell made from Cr(NO:):(aq)|Cr(s) andPt(s)|H;O(1)|H:(g) + OH(aq) with NaC(aq) as a salt bridge. Make sure to label:• Anode and cathode• The oxidation and reduction half-reactions and where they are occurring• The direction the electrons are flowing (away and toward)• If the solid electrode is gaining, losing, or has no change in mass• if the concentration of ions in solution are increasing, decreasing, orremaining constant• The direction the ions in the salt bridge (cations AND anions) are moving b.) Write the overall balanced redox reaction occurring in this voltaic cell. How manyelectrons are being transferred?c.) Calculate E°cal, in V. Is this process spontaneous?d.) Calculate AG°, in kl/mol.e.) Calculate Eei in V at 298 K when [Cr(NO:):] is 0.125 M, the pressure of H:(g) is1.50 atm, and the pH is 9.463. Is the process still spontaneous?

b) 6 electrons being transferred during electrochemical reaction.

b.) Write the overall balanced redox reaction occurring in this voltaic cell. How many electrons are being transferred? c.) Calculate E°cei, in v. Is this process spontaneous? d.) Calculate AG°, in kJ/mol.

b.) Write the overall balanced redox reaction occurring in this voltaic cell. How many electrons are being transferred? c.) Calculate E°cei, in v. Is this process spontaneous? d.) Calculate AG°, in kJ/mol.

Chemistry

10th Edition

ISBN:9781305957404

Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Publisher:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Chapter1: Chemical Foundations

Section: Chapter Questions

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Concept explainers

Electronic Effects

The effect of electrons that are located in the chemical bonds within the atoms of the molecule is termed an electronic effect. The electronic effect is also explained as the effect through which the reactivity of the compound in one portion is controlled by the electron repulsion or attraction producing in another portion of the molecule.

Drawing Resonance Forms

In organic chemistry, resonance may be a mental exercise that illustrates the delocalization of electrons inside molecules within the valence bond theory of octet bonding. It entails creating several Lewis structures that, when combined, reflect the molecule's entire electronic structure. One Lewis diagram cannot explain the bonding (lone pair, double bond, octet) elaborately. A hybrid describes a combination of possible resonance structures that represents the entire delocalization of electrons within the molecule.

Using Molecular Structure To Predict Equilibrium

Equilibrium does not always imply an equal presence of reactants and products. This signifies that the reaction reaches a point when reactant and product quantities remain constant as the rate of forward and backward reaction is the same. Molecular structures of various compounds can help in predicting equilibrium.

Question

Ignore Part A

1.) Consider the following reduction half-reactions.
Cra-(aq) + 3 e → Cr(s)
2 H;0(1) + 2 e → H:(g) + 2 OH(g)
a.) Draw a diagram of a voltaic cell made from Cr(NO:):(aq)|Cr(s) and
Pt(s)|H;O(1)|H:(g) + OH(aq) with NaC(aq) as a salt bridge. Make sure to label:
• Anode and cathode
• The oxidation and reduction half-reactions and where they are occurring
• The direction the electrons are flowing (away and toward)
• If the solid electrode is gaining, losing, or has no change in mass
• if the concentration of ions in solution are increasing, decreasing, or
remaining constant
• The direction the ions in the salt bridge (cations AND anions) are moving

b.) Write the overall balanced redox reaction occurring in this voltaic cell. How many
electrons are being transferred?
c.) Calculate E°cal, in V. Is this process spontaneous?
d.) Calculate AG°, in kl/mol.
e.) Calculate Eei in V at 298 K when [Cr(NO:):] is 0.125 M, the pressure of H:(g) is
1.50 atm, and the pH is 9.463. Is the process still spontaneous?

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