In the construction of a voltaic cell with Ag(CN)2- and Cr, which of the following cell diagrams is correct? A) Ag(s) | Cr3+(aq) || Ag(CN)2-(aq) | Cr(s) B) Ag(CN)2-(aq) | Cr(s) ||... In the construction of a voltaic cell with Ag(CN)2- and Cr, which of the following cell diagrams is correct? A) Ag(s) | Cr3+(aq) || Ag(CN)2-(aq) | Cr(s) B) Ag(CN)2-(aq) | Cr(s) || Ag(s) | Cr3+(aq) C) Cr(s) | Cr3+(aq) || Ag(CN)2-(aq) | Ag(s) D) Ag(CN)2-(aq) | Ag(s) || Cr(s) | Cr3+(aq)
Understand the Problem
The question is asking to identify the correct cell diagram for a voltaic cell involving silver cyanide (Ag(CN)2-) and chromium (Cr). It requires knowledge of how to represent electrochemical cells using the appropriate cell diagram format.
Answer
Ag(CN)2-(aq) | Ag(s) || Cr(s) | Cr3+(aq).
The correct cell diagram for the voltaic cell constructed from Ag(CN)2-(aq) and Cr(s) is option D: Ag(CN)2-(aq) | Ag(s) || Cr(s) | Cr3+(aq).
Answer for screen readers
The correct cell diagram for the voltaic cell constructed from Ag(CN)2-(aq) and Cr(s) is option D: Ag(CN)2-(aq) | Ag(s) || Cr(s) | Cr3+(aq).
More Information
In voltaic cells, the anode reaction involves oxidation and the cathode reaction involves reduction. Chromium metal (Cr) is oxidized to Cr3+, while dicyanoargentate (Ag(CN)2-) ion is reduced to silver metal (Ag).
Tips
A common mistake is to misplace the components of the cell. Remember that oxidation occurs at the anode, and reduction occurs at the cathode.
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