A student records the following observations while a voltaic cell operates for ten…

CHEMISTRY · Single correct · AP · Chemistry · Thermodynamics and Electrochemistry · Thermodynamics and Electrochemistry

Problem

A student records the following observations while a voltaic cell operates for ten minutes: • A silver electrode increases in mass by 0.32 g0.32\,\text{g}. • The green color of the iron(II) solution around the iron electrode intensifies. • No gases are produced at either electrode. Which net ionic equation is most consistent with the student’s observations? (a) Fe(s)+Ag+(aq)→Fe2+(aq)+Ag(s)Fe(s) + Ag^{+}(aq) \rightarrow Fe^{2+}(aq) + Ag(s) (b) 2 Fe2+(aq)+Ag+(aq)→2 Fe3+(aq)+Ag(s)2\,Fe^{2+}(aq) + Ag^{+}(aq) \rightarrow 2\,Fe^{3+}(aq) + Ag(s) (c) Fe(s)+2 Ag+(aq)→Fe2+(aq)+2 Ag(s)Fe(s) + 2\,Ag^{+}(aq) \rightarrow Fe^{2+}(aq) + 2\,Ag(s) (d) Fe(s)+2 Ag+(aq)→Fe3+(aq)+2 Ag(s)Fe(s) + 2\,Ag^{+}(aq) \rightarrow Fe^{3+}(aq) + 2\,Ag(s)

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