Consider the following two half-reactions and their standard reduction potentials for a voltaic cell. $$N2?O(g)+2H+(aq)+2e? N2?(g)+H2?O(l)$$E° = 1.766 V $$MnO ? 4?(aq)+4H+(aq)+3e? MnO2?(s)+2H2?O(l)
Added by Isabella D.
Step 1
766 V 2) MnO4-(aq) + 4H+(aq) + 3e- → MnO2(s) + 2H2O(l) Show more…
Show all steps
Your feedback will help us improve your experience
Wei Yang and 70 other Chemistry 102 educators are ready to help you.
Ask a new question
Labs
Want to see this concept in action?
Explore this concept interactively to see how it behaves as you change inputs.
Key Concepts
Recommended Videos
Give the balanced cell equation and determine $\mathscr{E}^{\circ}$ for the galvanic cells based on the following half-reactions. Standard reduction potentials are found in Table 18.1. a. $\mathrm{Cr}_{2} \mathrm{O}_{7}^{2-}+14 \mathrm{H}^{+}+6 \mathrm{e}^{-} \rightarrow 2 \mathrm{Cr}^{3+}+7 \mathrm{H}_{2} \mathrm{O}$ $\mathrm{H}_{2} \mathrm{O}_{2}+2 \mathrm{H}^{+}+2 \mathrm{e}^{-} \rightarrow 2 \mathrm{H}_{2} \mathrm{O}$ b. $2 \mathrm{H}^{+}+2 \mathrm{e}^{-} \rightarrow \mathrm{H}_{2}$ $\mathrm{Al}^{3+}+3 \mathrm{e}^{-} \rightarrow \mathrm{Al}$
Use the table of standard reduction potentials (Appendix $\mathrm{M}$ ) to calculate $\Delta_{\mathrm{r}} \mathrm{G}^{\circ}$ for the following reactions at $298 \mathrm{K}$ (a) $3 \mathrm{Cu}(\mathrm{s})+2 \mathrm{NO}_{3}^{-}(\mathrm{aq})+8 \mathrm{H}^{+}(\mathrm{aq}) \rightarrow$ $3 \mathrm{Cu}^{2+}(\mathrm{aq})+2 \mathrm{NO}(\mathrm{g})+4 \mathrm{H}_{2} \mathrm{O}(\ell)$ (b) $\mathrm{H}_{2} \mathrm{O}_{2}(\mathrm{aq})+2 \mathrm{Cl}^{-}(\mathrm{aq})+2 \mathrm{H}^{+}(\mathrm{aq}) \rightarrow$ $\mathrm{Cl}_{2}(\mathrm{g})+2 \mathrm{H}_{2} \mathrm{O}(\ell)$
Use the following half-reactions to write three spontaneous reactions, calculate E°cell for each reaction and rank the strengths of the oxidizing and reducing agents: i. Au+ (aq) + e-- ? Au (s) Eo = 1.69 V ii. N2O (g) + 2 H+ (aq) + 2 e-- ? N2 (g) + H2O (l) Eo = 1.77 V iii. Cr3+ (aq) + 3e--? Cr (s) Eo = 0.74 V
Ronald P.
Recommended Textbooks
Chemistry: Structure and Properties
Chemistry The Central Science
Chemistry
18,000,000+
Students on Numerade
Trusted by students at 8,000+ universities
Watch the video solution with this free unlock.
EMAIL
PASSWORD