Exam 20: Principles of Chemical Reactivity: Electron Transfer Reactions

Gold and platinum are commonly used as inert electrodes in laboratory experiments. In commercial applications, such as batteries, _____ is more commonly used as an inert electrodes because it is far less expensive.

A voltaic cell or galvanic cell converts chemical energy to electrical energy. $E _ { \text {cell } } ^ { \circ }$ for the given galvanic cell is -1.80 V. Fe²⁺(aq) + 2 Cl^-(aq) ? Fe(s) + Cl₂(g) Calculate the value of ?_rG° for the reaction.

Calculate E°_cell for the cell for the reaction 2 Ga(s) + 3 Sn⁴⁺(aq) → 3 Sn²⁺(aq) +2 Ga³⁺(aq). The standard reduction potentials are as follows: Ga³⁺(aq) + 3 e− → Ga(s) E° = -0.55 V Sn⁴⁺(aq) + 2 e− → Sn²⁺(aq) E° = 0.15V ​