Chemistry

Problem

A student records the following observations while a voltaic cell operates for ten minutes: • A silver electrode increases in mass by

0.32\,\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) \rightarrow Fe^{2+}(aq) + Ag(s)

2\,Fe^{2+}(aq) + Ag^{+}(aq) \rightarrow 2\,Fe^{3+}(aq) + Ag(s)

Fe(s) + 2\,Ag^{+}(aq) \rightarrow Fe^{2+}(aq) + 2\,Ag(s)

Fe(s) + 2\,Ag^{+}(aq) \rightarrow Fe^{3+}(aq) + 2\,Ag(s)

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