Consider the Reaction of Iodine with Manganese Dioxide

question 113

Multiple Choice

Consider the reaction of iodine with manganese dioxide. 3I₂(s) + 2MnO₂(s) + 8OH^-(aq) 6I^-(aq) + 2MnO₄^-(aq) + 4H₂O(l)
The equilibrium constant for the overall reaction is 8.3 × 10^-7.What is E°_cell for the reaction at 25°C? (R = 8.314 J/K • mol,F = 96,500 C • mol^-1)

• A)-0.36 V
• B)-0.18 V
• C)-0.12 V
• D)-0.060 V
• E)+0.12 V

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Definitions:

Myelin sheath

A fatty layer that surrounds the axons of some nerve cells, serving to speed up electrical impulses.

Electrically charged atoms

Atoms that have either lost or gained electrons, resulting in a net positive or negative charge, respectively, known as ions.

Neurotransmitters

Chemical messengers in the body that transmit signals across a chemical synapse, from one neuron to another target neuron, muscle cell, or gland cell.

Axon

A long, thin part of a neuron that transmits impulses to other neurons through branching structures called axon terminals.