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Voltaic cell question

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If lithium atoms are oxidized while tin ions are reduced...
how do you explain

-which one of these elements would be present at the cathode and at the anode?
-to complete such a voltaic cell, a salt bridge would be necessary between the anode and the cathode...what's the purpose of this salt bridge?

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https://brainmass.com/chemistry/electrochemical-cells/voltaic-cell-question-303122

Solution Preview

A reduction requires electrons so occurs at the cathode - tin reaction occurs ...

Solution Summary

The expert examines lithium atoms being oxidized while tin ions are reduced. If these elements are present, the cathode and anode are determined. A salt-bridge is examined.

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