# B calculate the biological standard potential e for

• 8
• 100% (2) 2 out of 2 people found this document helpful

This preview shows page 2 - 5 out of 8 pages.

(b) Calculate the biological standard potential E* for the reduction of the biomolecule NAD+NADH in aqueous solution. You can assume [NAD] and [NADH+] are 1 M under these conditions.to
_______ V (c) The pyruvate ion is formed during the metabolism of glucose in the body. During exercise, the pyruvate ion is converted to lactate ion in the body by coupling to the half-reaction for NADH given in part (b). For the half-reaction, pyruvate(aq) + 2 H3O+(aq) + 2 e!lactate(aq) + 2 H2O(l) the biological standard potential E* = –0.190 V. Write the cell reaction for the spontaneous reaction that occurs between these two biological couples and calculate "E* and "G* for the overall reaction.
O
Name_________________________________ Page 3 of 8 3. Equilibrium constants from reduction potentials The following reduction potentials are available: Ag+(aq) + e!Ag(s) E°= 0.800 V Ag2CO3(s) + 2 e!2 Ag(s) + CO32–(aq) E°= 0.477 V (a) Compute the standard potential difference for the dissolving of silver carbonate:
)
(b) Compute the solubility product Kspfor silver carbonate !"o=0.05922logKsplogKsp=2!"
(c) What is the concentration of Ag+ion in a solution containing 0.2 M carbonate?
Name_________________________________ Page 4 of 8